diff --git a/src/main/java/org/gitlab4j/api/models/AbstractUser.java b/src/main/java/org/gitlab4j/api/models/AbstractUser.java
index 80ff36330..cacb79ee2 100644
--- a/src/main/java/org/gitlab4j/api/models/AbstractUser.java
+++ b/src/main/java/org/gitlab4j/api/models/AbstractUser.java
@@ -1,13 +1,15 @@
 package org.gitlab4j.api.models;
 
-import com.fasterxml.jackson.annotation.JsonIgnoreProperties;
-
 import java.util.Date;
 import java.util.List;
 
 import javax.xml.bind.annotation.XmlAccessType;
 import javax.xml.bind.annotation.XmlAccessorType;
 
+import org.gitlab4j.api.utils.JacksonJson;
+
+import com.fasterxml.jackson.annotation.JsonIgnoreProperties;
+
 @XmlAccessorType(XmlAccessType.FIELD)
 @JsonIgnoreProperties(ignoreUnknown = true)
 public abstract class AbstractUser<U extends AbstractUser<U>> {
@@ -493,4 +495,9 @@ public U withCustomAttributes(List<CustomAttribute> customAttributes) {
         this.customAttributes = customAttributes;
         return (U)this;
     }
+    
+    @Override
+    public String toString() {
+        return (JacksonJson.toJsonString(this));
+    }
 }
diff --git a/src/main/java/org/gitlab4j/api/models/Artifact.java b/src/main/java/org/gitlab4j/api/models/Artifact.java
index f9e143b65..bee2a16a9 100644
--- a/src/main/java/org/gitlab4j/api/models/Artifact.java
+++ b/src/main/java/org/gitlab4j/api/models/Artifact.java
@@ -4,6 +4,7 @@
 import javax.xml.bind.annotation.XmlAccessorType;
 import javax.xml.bind.annotation.XmlRootElement;
 
+import org.gitlab4j.api.utils.JacksonJson;
 import org.gitlab4j.api.utils.JacksonJsonEnumHelper;
 
 import com.fasterxml.jackson.annotation.JsonCreator;
@@ -70,4 +71,9 @@ public String getFileFormat() {
     public void setFileFormat(String fileFormat) {
         this.fileFormat = fileFormat;
     }
+
+    @Override
+    public String toString() {
+        return (JacksonJson.toJsonString(this));
+    }
 }
diff --git a/src/main/java/org/gitlab4j/api/models/ArtifactsFile.java b/src/main/java/org/gitlab4j/api/models/ArtifactsFile.java
index d168ad2ef..2567931df 100644
--- a/src/main/java/org/gitlab4j/api/models/ArtifactsFile.java
+++ b/src/main/java/org/gitlab4j/api/models/ArtifactsFile.java
@@ -4,6 +4,8 @@
 import javax.xml.bind.annotation.XmlAccessorType;
 import javax.xml.bind.annotation.XmlRootElement;
 
+import org.gitlab4j.api.utils.JacksonJson;
+
 @XmlRootElement
 @XmlAccessorType(XmlAccessType.FIELD)
 public class ArtifactsFile {
@@ -12,18 +14,23 @@ public class ArtifactsFile {
     private Integer size;
 
     public String getFilename() {
-    return filename;
-  }
+        return filename;
+    }
 
     public void setFilename(String filename) {
-    this.filename = filename;
-  }
+        this.filename = filename;
+    }
 
     public Integer getSize() {
-    return size;
-  }
+        return size;
+    }
 
     public void setSize(Integer size) {
-    this.size = size;
-  }
+        this.size = size;
+    }
+
+    @Override
+    public String toString() {
+        return (JacksonJson.toJsonString(this));
+    }
 }
diff --git a/src/main/java/org/gitlab4j/api/models/AwardEmoji.java b/src/main/java/org/gitlab4j/api/models/AwardEmoji.java
index b1c4a391d..662213bbb 100644
--- a/src/main/java/org/gitlab4j/api/models/AwardEmoji.java
+++ b/src/main/java/org/gitlab4j/api/models/AwardEmoji.java
@@ -7,6 +7,7 @@
 import javax.xml.bind.annotation.XmlAccessorType;
 import javax.xml.bind.annotation.XmlRootElement;
 
+import org.gitlab4j.api.utils.JacksonJson;
 import org.gitlab4j.api.utils.JacksonJsonEnumHelper;
 
 import com.fasterxml.jackson.annotation.JsonCreator;
@@ -100,4 +101,9 @@ public AwardableType getAwardableType() {
     public void setAwardableType(AwardableType awardableType) {
         this.awardableType = awardableType;
     }
+
+    @Override
+    public String toString() {
+        return (JacksonJson.toJsonString(this));
+    }
 }
diff --git a/src/main/java/org/gitlab4j/api/models/Branch.java b/src/main/java/org/gitlab4j/api/models/Branch.java
index 04285fc97..7c3b49389 100644
--- a/src/main/java/org/gitlab4j/api/models/Branch.java
+++ b/src/main/java/org/gitlab4j/api/models/Branch.java
@@ -5,6 +5,8 @@
 import javax.xml.bind.annotation.XmlAccessorType;
 import javax.xml.bind.annotation.XmlRootElement;
 
+import org.gitlab4j.api.utils.JacksonJson;
+
 @XmlRootElement
 @XmlAccessorType(XmlAccessType.FIELD)
 public class Branch {
@@ -98,4 +100,9 @@ public Branch withIsProtected(Boolean isProtected) {
         this.isProtected = isProtected;
         return this;
     }
+
+    @Override
+    public String toString() {
+        return (JacksonJson.toJsonString(this));
+    }
 }
diff --git a/src/main/java/org/gitlab4j/api/models/Changes.java b/src/main/java/org/gitlab4j/api/models/Changes.java
index ca2e3bc06..92c3ae78a 100644
--- a/src/main/java/org/gitlab4j/api/models/Changes.java
+++ b/src/main/java/org/gitlab4j/api/models/Changes.java
@@ -1,5 +1,7 @@
 package org.gitlab4j.api.models;
 
+import org.gitlab4j.api.utils.JacksonJson;
+
 import com.fasterxml.jackson.annotation.JsonInclude;
 import com.fasterxml.jackson.annotation.JsonProperty;
 
@@ -87,4 +89,9 @@ public Boolean getRenamedFile() {
     public void setRenamedFile(Boolean renamedFile) {
         this.renamedFile = renamedFile;
     }
+
+    @Override
+    public String toString() {
+        return (JacksonJson.toJsonString(this));
+    }
 }
diff --git a/src/main/java/org/gitlab4j/api/models/Comment.java b/src/main/java/org/gitlab4j/api/models/Comment.java
index 4a1da6158..80279b01a 100644
--- a/src/main/java/org/gitlab4j/api/models/Comment.java
+++ b/src/main/java/org/gitlab4j/api/models/Comment.java
@@ -7,6 +7,7 @@
 import javax.xml.bind.annotation.XmlRootElement;
 
 import org.gitlab4j.api.Constants.LineType;
+import org.gitlab4j.api.utils.JacksonJson;
 
 @XmlRootElement
 @XmlAccessorType(XmlAccessType.FIELD)
@@ -66,4 +67,9 @@ public String getNote() {
     public void setNote(String note) {
         this.note = note;
     }
+
+    @Override
+    public String toString() {
+        return (JacksonJson.toJsonString(this));
+    }
 }
diff --git a/src/main/java/org/gitlab4j/api/models/Commit.java b/src/main/java/org/gitlab4j/api/models/Commit.java
index 1de225c24..233911fd9 100644
--- a/src/main/java/org/gitlab4j/api/models/Commit.java
+++ b/src/main/java/org/gitlab4j/api/models/Commit.java
@@ -8,6 +8,8 @@
 import javax.xml.bind.annotation.XmlAccessorType;
 import javax.xml.bind.annotation.XmlRootElement;
 
+import org.gitlab4j.api.utils.JacksonJson;
+
 @XmlRootElement
 @XmlAccessorType(XmlAccessType.FIELD)
 public class Commit {
@@ -251,4 +253,9 @@ public Commit withUrl(String url) {
         this.url = url;
         return this;
     }
+
+    @Override
+    public String toString() {
+        return (JacksonJson.toJsonString(this));
+    }
 }
diff --git a/src/main/java/org/gitlab4j/api/models/CommitAction.java b/src/main/java/org/gitlab4j/api/models/CommitAction.java
index 7893fd7d6..522c2be2e 100644
--- a/src/main/java/org/gitlab4j/api/models/CommitAction.java
+++ b/src/main/java/org/gitlab4j/api/models/CommitAction.java
@@ -1,5 +1,6 @@
 package org.gitlab4j.api.models;
 
+import org.gitlab4j.api.utils.JacksonJson;
 import org.gitlab4j.api.utils.JacksonJsonEnumHelper;
 
 import com.fasterxml.jackson.annotation.JsonCreator;
@@ -135,4 +136,9 @@ public CommitAction withLastCommitId(String lastCommitId) {
         this.lastCommitId = lastCommitId;
         return this;
     }
+
+    @Override
+    public String toString() {
+        return (JacksonJson.toJsonString(this));
+    }
 }
diff --git a/src/main/java/org/gitlab4j/api/models/CommitPayload.java b/src/main/java/org/gitlab4j/api/models/CommitPayload.java
index 1571b2994..411de7267 100644
--- a/src/main/java/org/gitlab4j/api/models/CommitPayload.java
+++ b/src/main/java/org/gitlab4j/api/models/CommitPayload.java
@@ -2,6 +2,8 @@
 
 import java.util.List;
 
+import org.gitlab4j.api.utils.JacksonJson;
+
 public class CommitPayload {
 
     private String branch;
@@ -58,4 +60,9 @@ public String getAuthorName() {
     public void setAuthorName(String authorName) {
         this.authorName = authorName;
     }
+
+    @Override
+    public String toString() {
+        return (JacksonJson.toJsonString(this));
+    }
 }
diff --git a/src/main/java/org/gitlab4j/api/models/CommitRef.java b/src/main/java/org/gitlab4j/api/models/CommitRef.java
index 39c7f8068..75a6e33ce 100644
--- a/src/main/java/org/gitlab4j/api/models/CommitRef.java
+++ b/src/main/java/org/gitlab4j/api/models/CommitRef.java
@@ -1,13 +1,15 @@
 package org.gitlab4j.api.models;
 
-import com.fasterxml.jackson.annotation.JsonCreator;
-import com.fasterxml.jackson.annotation.JsonValue;
-import org.gitlab4j.api.utils.JacksonJsonEnumHelper;
-
 import javax.xml.bind.annotation.XmlAccessType;
 import javax.xml.bind.annotation.XmlAccessorType;
 import javax.xml.bind.annotation.XmlRootElement;
 
+import org.gitlab4j.api.utils.JacksonJson;
+import org.gitlab4j.api.utils.JacksonJsonEnumHelper;
+
+import com.fasterxml.jackson.annotation.JsonCreator;
+import com.fasterxml.jackson.annotation.JsonValue;
+
 /**
  * @author Евгений Уткин (evgeny.utkin@mediascope.net)
  */
@@ -54,4 +56,9 @@ public String getName() {
     public void setName(String name) {
         this.name = name;
     }
+
+    @Override
+    public String toString() {
+        return (JacksonJson.toJsonString(this));
+    }
 }
diff --git a/src/main/java/org/gitlab4j/api/models/CommitStats.java b/src/main/java/org/gitlab4j/api/models/CommitStats.java
index 77b3d30e4..25bcb2242 100644
--- a/src/main/java/org/gitlab4j/api/models/CommitStats.java
+++ b/src/main/java/org/gitlab4j/api/models/CommitStats.java
@@ -3,6 +3,8 @@
 import javax.xml.bind.annotation.XmlAccessType;
 import javax.xml.bind.annotation.XmlAccessorType;
 
+import org.gitlab4j.api.utils.JacksonJson;
+
 @XmlAccessorType(XmlAccessType.FIELD)
 public class CommitStats {
 
@@ -33,4 +35,9 @@ public Integer getTotal() {
     public void setTotal(Integer total) {
         this.total = total;
     }
+
+    @Override
+    public String toString() {
+        return (JacksonJson.toJsonString(this));
+    }
 }
diff --git a/src/main/java/org/gitlab4j/api/models/CommitStatus.java b/src/main/java/org/gitlab4j/api/models/CommitStatus.java
index 9913da4c7..6f2983b11 100644
--- a/src/main/java/org/gitlab4j/api/models/CommitStatus.java
+++ b/src/main/java/org/gitlab4j/api/models/CommitStatus.java
@@ -7,6 +7,8 @@
 import javax.xml.bind.annotation.XmlAccessorType;
 import javax.xml.bind.annotation.XmlRootElement;
 
+import org.gitlab4j.api.utils.JacksonJson;
+
 @XmlRootElement
 @XmlAccessorType(XmlAccessType.FIELD)
 public class CommitStatus {
@@ -153,4 +155,9 @@ public CommitStatus withTargetUrl(String targetUrl) {
         this.targetUrl = targetUrl;
         return this;
     }
+
+    @Override
+    public String toString() {
+        return (JacksonJson.toJsonString(this));
+    }
 }
diff --git a/src/main/java/org/gitlab4j/api/models/CompareResults.java b/src/main/java/org/gitlab4j/api/models/CompareResults.java
index 1edb2ea0f..0ed8b22a8 100644
--- a/src/main/java/org/gitlab4j/api/models/CompareResults.java
+++ b/src/main/java/org/gitlab4j/api/models/CompareResults.java
@@ -7,6 +7,8 @@
 import javax.xml.bind.annotation.XmlAccessorType;
 import javax.xml.bind.annotation.XmlRootElement;
 
+import org.gitlab4j.api.utils.JacksonJson;
+
 @XmlRootElement
 @XmlAccessorType(XmlAccessType.FIELD)
 public class CompareResults {
@@ -56,4 +58,9 @@ public Boolean getCompareSameRef() {
     public void setCompareSameRef(Boolean compareSameRef) {
         this.compareSameRef = compareSameRef;
     }
+
+    @Override
+    public String toString() {
+        return (JacksonJson.toJsonString(this));
+    }
 }
diff --git a/src/main/java/org/gitlab4j/api/models/DeployKey.java b/src/main/java/org/gitlab4j/api/models/DeployKey.java
index f8e4b3e89..c593ff1ce 100644
--- a/src/main/java/org/gitlab4j/api/models/DeployKey.java
+++ b/src/main/java/org/gitlab4j/api/models/DeployKey.java
@@ -7,6 +7,8 @@
 import javax.xml.bind.annotation.XmlAccessorType;
 import javax.xml.bind.annotation.XmlRootElement;
 
+import org.gitlab4j.api.utils.JacksonJson;
+
 @XmlRootElement
 @XmlAccessorType(XmlAccessType.FIELD)
 public class DeployKey {
@@ -56,4 +58,9 @@ public Date getCreatedAt() {
     public void setCreatedAt(Date createdAt) {
         this.createdAt = createdAt;
     }
+
+    @Override
+    public String toString() {
+        return (JacksonJson.toJsonString(this));
+    }
 }
diff --git a/src/main/java/org/gitlab4j/api/models/Diff.java b/src/main/java/org/gitlab4j/api/models/Diff.java
index 9169e6254..35a91cfc9 100644
--- a/src/main/java/org/gitlab4j/api/models/Diff.java
+++ b/src/main/java/org/gitlab4j/api/models/Diff.java
@@ -5,6 +5,8 @@
 import javax.xml.bind.annotation.XmlAccessorType;
 import javax.xml.bind.annotation.XmlRootElement;
 
+import org.gitlab4j.api.utils.JacksonJson;
+
 import com.fasterxml.jackson.annotation.JsonInclude;
 import com.fasterxml.jackson.annotation.JsonProperty;
 
@@ -94,4 +96,9 @@ public Boolean getRenamedFile() {
     public void setRenamedFile(Boolean renamedFile) {
         this.renamedFile = renamedFile;
     }
+
+    @Override
+    public String toString() {
+        return (JacksonJson.toJsonString(this));
+    }
 }
diff --git a/src/main/java/org/gitlab4j/api/models/Epic.java b/src/main/java/org/gitlab4j/api/models/Epic.java
index 1b7f524ee..2964c293f 100644
--- a/src/main/java/org/gitlab4j/api/models/Epic.java
+++ b/src/main/java/org/gitlab4j/api/models/Epic.java
@@ -7,6 +7,8 @@
 import javax.xml.bind.annotation.XmlAccessorType;
 import javax.xml.bind.annotation.XmlRootElement;
 
+import org.gitlab4j.api.utils.JacksonJson;
+
 @XmlRootElement
 @XmlAccessorType(XmlAccessType.FIELD)
 public class Epic {
@@ -140,4 +142,9 @@ public Date getUpdatedAt() {
     public void setUpdatedAt(Date updatedAt) {
         this.updatedAt = updatedAt;
     }
+
+    @Override
+    public String toString() {
+        return (JacksonJson.toJsonString(this));
+    }
 }
diff --git a/src/main/java/org/gitlab4j/api/models/EpicIssue.java b/src/main/java/org/gitlab4j/api/models/EpicIssue.java
index f40be6a7c..b154e778b 100644
--- a/src/main/java/org/gitlab4j/api/models/EpicIssue.java
+++ b/src/main/java/org/gitlab4j/api/models/EpicIssue.java
@@ -6,6 +6,8 @@
 import javax.xml.bind.annotation.XmlAccessType;
 import javax.xml.bind.annotation.XmlAccessorType;
 
+import org.gitlab4j.api.utils.JacksonJson;
+
 import com.fasterxml.jackson.annotation.JsonIgnore;
 import com.fasterxml.jackson.annotation.JsonProperty;
 
@@ -78,4 +80,9 @@ public Integer getRelativePosition() {
     public void setRelativePosition(Integer relativePosition) {
         this.relativePosition = relativePosition;
     }
+
+    @Override
+    public String toString() {
+        return (JacksonJson.toJsonString(this));
+    }
 }
diff --git a/src/main/java/org/gitlab4j/api/models/Event.java b/src/main/java/org/gitlab4j/api/models/Event.java
index 6c5405d68..ee14d8398 100644
--- a/src/main/java/org/gitlab4j/api/models/Event.java
+++ b/src/main/java/org/gitlab4j/api/models/Event.java
@@ -8,6 +8,7 @@
 import javax.xml.bind.annotation.XmlRootElement;
 
 import org.gitlab4j.api.Constants.TargetType;
+import org.gitlab4j.api.utils.JacksonJson;
 
 @XmlRootElement
 @XmlAccessorType(XmlAccessType.FIELD)
@@ -200,4 +201,9 @@ public Event withCreatedAt(Date createdAt) {
         this.createdAt = createdAt;
         return this;
     }
+
+    @Override
+    public String toString() {
+        return (JacksonJson.toJsonString(this));
+    }
 }
diff --git a/src/main/java/org/gitlab4j/api/models/EventData.java b/src/main/java/org/gitlab4j/api/models/EventData.java
index 5a21ca71e..3f129528d 100644
--- a/src/main/java/org/gitlab4j/api/models/EventData.java
+++ b/src/main/java/org/gitlab4j/api/models/EventData.java
@@ -7,6 +7,8 @@
 import javax.xml.bind.annotation.XmlAccessorType;
 import javax.xml.bind.annotation.XmlRootElement;
 
+import org.gitlab4j.api.utils.JacksonJson;
+
 @XmlRootElement
 @XmlAccessorType(XmlAccessType.FIELD)
 public class EventData {
@@ -124,4 +126,9 @@ public EventData withUserName(String userName) {
         this.userName = userName;
         return this;
     }
+
+    @Override
+    public String toString() {
+        return (JacksonJson.toJsonString(this));
+    }
 }
diff --git a/src/main/java/org/gitlab4j/api/models/FileUpload.java b/src/main/java/org/gitlab4j/api/models/FileUpload.java
index 1fcb9e9ec..195316be9 100644
--- a/src/main/java/org/gitlab4j/api/models/FileUpload.java
+++ b/src/main/java/org/gitlab4j/api/models/FileUpload.java
@@ -4,6 +4,8 @@
 import javax.xml.bind.annotation.XmlAccessorType;
 import javax.xml.bind.annotation.XmlRootElement;
 
+import org.gitlab4j.api.utils.JacksonJson;
+
 @XmlRootElement
 @XmlAccessorType(XmlAccessType.FIELD)
 public class FileUpload {
@@ -35,4 +37,9 @@ public String getMarkdown() {
     public void setMarkdown(String markdown) {
         this.markdown = markdown;
     }
+
+    @Override
+    public String toString() {
+        return (JacksonJson.toJsonString(this));
+    }
 }
diff --git a/src/main/java/org/gitlab4j/api/models/Group.java b/src/main/java/org/gitlab4j/api/models/Group.java
index b51a5dd33..8d59711b5 100644
--- a/src/main/java/org/gitlab4j/api/models/Group.java
+++ b/src/main/java/org/gitlab4j/api/models/Group.java
@@ -7,6 +7,8 @@
 import javax.xml.bind.annotation.XmlAccessorType;
 import javax.xml.bind.annotation.XmlRootElement;
 
+import org.gitlab4j.api.utils.JacksonJson;
+
 @XmlRootElement
 @XmlAccessorType(XmlAccessType.FIELD)
 public class Group {
@@ -275,4 +277,9 @@ public Group withSharedProjects(List<Project> sharedProjects) {
         this.sharedProjects = sharedProjects;
         return this;
     }
+
+    @Override
+    public String toString() {
+        return (JacksonJson.toJsonString(this));
+    }
 }
diff --git a/src/main/java/org/gitlab4j/api/models/HealthCheckInfo.java b/src/main/java/org/gitlab4j/api/models/HealthCheckInfo.java
index a83f2bfae..ca65d287d 100644
--- a/src/main/java/org/gitlab4j/api/models/HealthCheckInfo.java
+++ b/src/main/java/org/gitlab4j/api/models/HealthCheckInfo.java
@@ -4,6 +4,8 @@
 import javax.xml.bind.annotation.XmlAccessorType;
 import javax.xml.bind.annotation.XmlRootElement;
 
+import org.gitlab4j.api.utils.JacksonJson;
+
 @XmlRootElement
 @XmlAccessorType(XmlAccessType.FIELD)
 public class HealthCheckInfo {
@@ -70,4 +72,9 @@ public HealthCheckItem getGitalyCheck() {
     public void setGitalyCheck(HealthCheckItem gitalyCheck) {
         this.gitalyCheck = gitalyCheck;
     }
+
+    @Override
+    public String toString() {
+        return (JacksonJson.toJsonString(this));
+    }
 }
diff --git a/src/main/java/org/gitlab4j/api/models/HealthCheckItem.java b/src/main/java/org/gitlab4j/api/models/HealthCheckItem.java
index c337ea33c..44b6076cb 100644
--- a/src/main/java/org/gitlab4j/api/models/HealthCheckItem.java
+++ b/src/main/java/org/gitlab4j/api/models/HealthCheckItem.java
@@ -1,8 +1,11 @@
 package org.gitlab4j.api.models;
 
+import java.util.Map;
+
 import javax.xml.bind.annotation.XmlAccessType;
 import javax.xml.bind.annotation.XmlAccessorType;
-import java.util.Map;
+
+import org.gitlab4j.api.utils.JacksonJson;
 
 @XmlAccessorType(XmlAccessType.FIELD)
 public class HealthCheckItem {
@@ -33,4 +36,9 @@ public String getMessage() {
     public void setMessage(String message) {
         this.message = message;
     }
+
+    @Override
+    public String toString() {
+        return (JacksonJson.toJsonString(this));
+    }
 }
diff --git a/src/main/java/org/gitlab4j/api/models/Identity.java b/src/main/java/org/gitlab4j/api/models/Identity.java
index 7f5d553d8..4e04f2647 100644
--- a/src/main/java/org/gitlab4j/api/models/Identity.java
+++ b/src/main/java/org/gitlab4j/api/models/Identity.java
@@ -3,6 +3,8 @@
 import javax.xml.bind.annotation.XmlAccessType;
 import javax.xml.bind.annotation.XmlAccessorType;
 
+import org.gitlab4j.api.utils.JacksonJson;
+
 @XmlAccessorType(XmlAccessType.FIELD)
 public class Identity {
 
@@ -24,4 +26,9 @@ public String getExternUid() {
     public void setExternUid(String externUid) {
         this.externUid = externUid;
     }
+
+    @Override
+    public String toString() {
+        return (JacksonJson.toJsonString(this));
+    }
 }
diff --git a/src/main/java/org/gitlab4j/api/models/ImpersonationToken.java b/src/main/java/org/gitlab4j/api/models/ImpersonationToken.java
index 5f93c92aa..1fa3c385f 100644
--- a/src/main/java/org/gitlab4j/api/models/ImpersonationToken.java
+++ b/src/main/java/org/gitlab4j/api/models/ImpersonationToken.java
@@ -6,6 +6,7 @@
 import javax.xml.bind.annotation.XmlAccessType;
 import javax.xml.bind.annotation.XmlAccessorType;
 
+import org.gitlab4j.api.utils.JacksonJson;
 import org.gitlab4j.api.utils.JacksonJsonEnumHelper;
 
 import com.fasterxml.jackson.annotation.JsonCreator;
@@ -118,4 +119,9 @@ public Date getExpiresAt() {
     public void setExpiresAt(Date expiresAt) {
         this.expiresAt = expiresAt;
     }
+
+    @Override
+    public String toString() {
+        return (JacksonJson.toJsonString(this));
+    }
 }
diff --git a/src/main/java/org/gitlab4j/api/models/Issue.java b/src/main/java/org/gitlab4j/api/models/Issue.java
index 308de4ca5..90d50e32f 100644
--- a/src/main/java/org/gitlab4j/api/models/Issue.java
+++ b/src/main/java/org/gitlab4j/api/models/Issue.java
@@ -9,6 +9,7 @@
 import javax.xml.bind.annotation.XmlRootElement;
 
 import org.gitlab4j.api.Constants.IssueState;
+import org.gitlab4j.api.utils.JacksonJson;
 
 @XmlRootElement
 @XmlAccessorType(XmlAccessType.FIELD)
@@ -221,4 +222,9 @@ public TimeStats getTimeStats() {
     public void setTimeStats(TimeStats timeStats) {
         this.timeStats = timeStats;
     }
+
+    @Override
+    public String toString() {
+        return (JacksonJson.toJsonString(this));
+    }
 }
diff --git a/src/main/java/org/gitlab4j/api/models/Job.java b/src/main/java/org/gitlab4j/api/models/Job.java
index ebbe43e9c..6aebee81f 100644
--- a/src/main/java/org/gitlab4j/api/models/Job.java
+++ b/src/main/java/org/gitlab4j/api/models/Job.java
@@ -7,6 +7,8 @@
 import javax.xml.bind.annotation.XmlAccessorType;
 import javax.xml.bind.annotation.XmlRootElement;
 
+import org.gitlab4j.api.utils.JacksonJson;
+
 @XmlRootElement
 @XmlAccessorType(XmlAccessType.FIELD)
 public class Job {
@@ -248,4 +250,9 @@ public Job withStatus(JobStatus status) {
         this.status = status;
         return this;
     }
+
+    @Override
+    public String toString() {
+        return (JacksonJson.toJsonString(this));
+    }
 }
diff --git a/src/main/java/org/gitlab4j/api/models/Key.java b/src/main/java/org/gitlab4j/api/models/Key.java
index 2211bf8e0..8f3bb5fdb 100644
--- a/src/main/java/org/gitlab4j/api/models/Key.java
+++ b/src/main/java/org/gitlab4j/api/models/Key.java
@@ -7,6 +7,8 @@
 import javax.xml.bind.annotation.XmlAccessorType;
 import javax.xml.bind.annotation.XmlRootElement;
 
+import org.gitlab4j.api.utils.JacksonJson;
+
 @XmlRootElement
 @XmlAccessorType(XmlAccessType.FIELD)
 public class Key {
@@ -56,4 +58,9 @@ public User getUser() {
     public void setUser(User user) {
         this.user = user;
     }
+
+    @Override
+    public String toString() {
+        return (JacksonJson.toJsonString(this));
+    }
 }
diff --git a/src/main/java/org/gitlab4j/api/models/Label.java b/src/main/java/org/gitlab4j/api/models/Label.java
index a0b534eaa..b7e84369f 100644
--- a/src/main/java/org/gitlab4j/api/models/Label.java
+++ b/src/main/java/org/gitlab4j/api/models/Label.java
@@ -4,6 +4,8 @@
 import javax.xml.bind.annotation.XmlAccessorType;
 import javax.xml.bind.annotation.XmlRootElement;
 
+import org.gitlab4j.api.utils.JacksonJson;
+
 @XmlRootElement
 @XmlAccessorType(XmlAccessType.FIELD)
 public class Label {
@@ -89,4 +91,9 @@ public Integer getPriority() {
     public void setPriority(Integer priority) {
         this.priority = priority;
     }
+
+    @Override
+    public String toString() {
+        return (JacksonJson.toJsonString(this));
+    }
 }
diff --git a/src/main/java/org/gitlab4j/api/models/LicenseTemplate.java b/src/main/java/org/gitlab4j/api/models/LicenseTemplate.java
index d8feafa9d..10531aab4 100644
--- a/src/main/java/org/gitlab4j/api/models/LicenseTemplate.java
+++ b/src/main/java/org/gitlab4j/api/models/LicenseTemplate.java
@@ -1,10 +1,13 @@
 package org.gitlab4j.api.models;
 
 import java.util.List;
+
 import javax.xml.bind.annotation.XmlAccessType;
 import javax.xml.bind.annotation.XmlAccessorType;
 import javax.xml.bind.annotation.XmlRootElement;
 
+import org.gitlab4j.api.utils.JacksonJson;
+
 @XmlRootElement
 @XmlAccessorType(XmlAccessType.FIELD)
 public class LicenseTemplate {
@@ -108,4 +111,9 @@ public String getContent() {
     public void setContent(String content) {
         this.content = content;
     }
+
+    @Override
+    public String toString() {
+        return (JacksonJson.toJsonString(this));
+    }
 }
diff --git a/src/main/java/org/gitlab4j/api/models/Markdown.java b/src/main/java/org/gitlab4j/api/models/Markdown.java
index 74e674c29..4a0d6af84 100644
--- a/src/main/java/org/gitlab4j/api/models/Markdown.java
+++ b/src/main/java/org/gitlab4j/api/models/Markdown.java
@@ -4,6 +4,8 @@
 import javax.xml.bind.annotation.XmlAccessorType;
 import javax.xml.bind.annotation.XmlRootElement;
 
+import org.gitlab4j.api.utils.JacksonJson;
+
 @XmlRootElement
 @XmlAccessorType(XmlAccessType.FIELD)
 public class Markdown {
@@ -17,4 +19,9 @@ public String getHtml() {
     public void setHtml(String html) {
         this.html = html;
     }
+
+    @Override
+    public String toString() {
+        return (JacksonJson.toJsonString(this));
+    }
 }
diff --git a/src/main/java/org/gitlab4j/api/models/Member.java b/src/main/java/org/gitlab4j/api/models/Member.java
index aca053052..8c8440f0d 100644
--- a/src/main/java/org/gitlab4j/api/models/Member.java
+++ b/src/main/java/org/gitlab4j/api/models/Member.java
@@ -7,6 +7,8 @@
 import javax.xml.bind.annotation.XmlAccessorType;
 import javax.xml.bind.annotation.XmlRootElement;
 
+import org.gitlab4j.api.utils.JacksonJson;
+
 @XmlRootElement
 @XmlAccessorType(XmlAccessType.FIELD)
 public class Member {
@@ -90,4 +92,9 @@ public Member withUsername(String username) {
         this.username = username;
         return this;
     }
+
+    @Override
+    public String toString() {
+        return (JacksonJson.toJsonString(this));
+    }
 }
diff --git a/src/main/java/org/gitlab4j/api/models/MergeRequest.java b/src/main/java/org/gitlab4j/api/models/MergeRequest.java
index 2d7e496b7..32d11e3fb 100644
--- a/src/main/java/org/gitlab4j/api/models/MergeRequest.java
+++ b/src/main/java/org/gitlab4j/api/models/MergeRequest.java
@@ -373,4 +373,9 @@ public void setApprovedBy(List<User> approvedBy) {
     public static final boolean isValid(MergeRequest mergeRequest) {
         return (mergeRequest != null && mergeRequest.getId() != null);
     }
+
+    @Override
+    public String toString() {
+        return (JacksonJson.toJsonString(this));
+    }
 }
diff --git a/src/main/java/org/gitlab4j/api/models/Milestone.java b/src/main/java/org/gitlab4j/api/models/Milestone.java
index 06fbfbc0e..b51fca11f 100644
--- a/src/main/java/org/gitlab4j/api/models/Milestone.java
+++ b/src/main/java/org/gitlab4j/api/models/Milestone.java
@@ -6,6 +6,8 @@
 import javax.xml.bind.annotation.XmlAccessorType;
 import javax.xml.bind.annotation.XmlRootElement;
 
+import org.gitlab4j.api.utils.JacksonJson;
+
 @XmlRootElement
 @XmlAccessorType(XmlAccessType.FIELD)
 public class Milestone {
@@ -91,4 +93,9 @@ public Date getUpdatedAt() {
     public void setUpdatedAt(Date updatedAt) {
         this.updatedAt = updatedAt;
     }
+
+    @Override
+    public String toString() {
+        return (JacksonJson.toJsonString(this));
+    }
 }
diff --git a/src/main/java/org/gitlab4j/api/models/Namespace.java b/src/main/java/org/gitlab4j/api/models/Namespace.java
index 2c95d153a..3db65aaf4 100644
--- a/src/main/java/org/gitlab4j/api/models/Namespace.java
+++ b/src/main/java/org/gitlab4j/api/models/Namespace.java
@@ -4,6 +4,8 @@
 import javax.xml.bind.annotation.XmlAccessorType;
 import javax.xml.bind.annotation.XmlRootElement;
 
+import org.gitlab4j.api.utils.JacksonJson;
+
 @XmlRootElement
 @XmlAccessorType(XmlAccessType.FIELD)
 public class Namespace {
@@ -78,4 +80,9 @@ public Namespace withFullPath(String fullPath) {
         this.fullPath = fullPath;
         return this;
     }
+
+    @Override
+    public String toString() {
+        return (JacksonJson.toJsonString(this));
+    }
 }
diff --git a/src/main/java/org/gitlab4j/api/models/Note.java b/src/main/java/org/gitlab4j/api/models/Note.java
index 20269779e..77976b556 100644
--- a/src/main/java/org/gitlab4j/api/models/Note.java
+++ b/src/main/java/org/gitlab4j/api/models/Note.java
@@ -6,6 +6,7 @@
 import javax.xml.bind.annotation.XmlAccessorType;
 import javax.xml.bind.annotation.XmlRootElement;
 
+import org.gitlab4j.api.utils.JacksonJson;
 import org.gitlab4j.api.utils.JacksonJsonEnumHelper;
 
 import com.fasterxml.jackson.annotation.JsonCreator;
@@ -193,4 +194,9 @@ public Boolean getUpvote() {
     public void setUpvote(Boolean upvote) {
         this.upvote = upvote;
     }
+
+    @Override
+    public String toString() {
+        return (JacksonJson.toJsonString(this));
+    }
 }
diff --git a/src/main/java/org/gitlab4j/api/models/NotificationSettings.java b/src/main/java/org/gitlab4j/api/models/NotificationSettings.java
index 4a4189c31..eedd50756 100644
--- a/src/main/java/org/gitlab4j/api/models/NotificationSettings.java
+++ b/src/main/java/org/gitlab4j/api/models/NotificationSettings.java
@@ -4,6 +4,7 @@
 import javax.xml.bind.annotation.XmlAccessorType;
 import javax.xml.bind.annotation.XmlRootElement;
 
+import org.gitlab4j.api.utils.JacksonJson;
 import org.gitlab4j.api.utils.JacksonJsonEnumHelper;
 
 import com.fasterxml.jackson.annotation.JsonCreator;
@@ -146,6 +147,11 @@ public Boolean getSuccessPipeline() {
         public void setSuccessPipeline(Boolean successPipeline) {
             this.successPipeline = successPipeline;
         }
+
+        @Override
+        public String toString() {
+            return (JacksonJson.toJsonString(this));
+        }
     }
 
     private Level level;
@@ -175,4 +181,9 @@ public Events getEvents() {
     public void setEvents(Events events) {
         this.events = events;
     }
+
+    @Override
+    public String toString() {
+        return (JacksonJson.toJsonString(this));
+    }
 }
\ No newline at end of file
diff --git a/src/main/java/org/gitlab4j/api/models/Owner.java b/src/main/java/org/gitlab4j/api/models/Owner.java
index eb062c9af..97e651de9 100644
--- a/src/main/java/org/gitlab4j/api/models/Owner.java
+++ b/src/main/java/org/gitlab4j/api/models/Owner.java
@@ -6,6 +6,8 @@
 import javax.xml.bind.annotation.XmlAccessorType;
 import javax.xml.bind.annotation.XmlRootElement;
 
+import org.gitlab4j.api.utils.JacksonJson;
+
 @XmlRootElement
 @XmlAccessorType(XmlAccessType.FIELD)
 public class Owner {
@@ -37,4 +39,9 @@ public String getName() {
     public void setName(String name) {
         this.name = name;
     }
+
+    @Override
+    public String toString() {
+        return (JacksonJson.toJsonString(this));
+    }
 }
diff --git a/src/main/java/org/gitlab4j/api/models/Permissions.java b/src/main/java/org/gitlab4j/api/models/Permissions.java
index faf894764..eb22c69e6 100644
--- a/src/main/java/org/gitlab4j/api/models/Permissions.java
+++ b/src/main/java/org/gitlab4j/api/models/Permissions.java
@@ -4,6 +4,8 @@
 import javax.xml.bind.annotation.XmlAccessorType;
 import javax.xml.bind.annotation.XmlRootElement;
 
+import org.gitlab4j.api.utils.JacksonJson;
+
 @XmlRootElement
 @XmlAccessorType(XmlAccessType.FIELD)
 public class Permissions {   
@@ -26,4 +28,9 @@ public ProjectAccess getGroupAccess() {
     public void setGroupAccess(ProjectAccess groupAccess) {
         this.groupAccess = groupAccess;
     }
+
+    @Override
+    public String toString() {
+        return (JacksonJson.toJsonString(this));
+    }
 }
diff --git a/src/main/java/org/gitlab4j/api/models/Pipeline.java b/src/main/java/org/gitlab4j/api/models/Pipeline.java
index 9b29556e4..1e6c302f1 100644
--- a/src/main/java/org/gitlab4j/api/models/Pipeline.java
+++ b/src/main/java/org/gitlab4j/api/models/Pipeline.java
@@ -6,6 +6,8 @@
 import javax.xml.bind.annotation.XmlAccessorType;
 import javax.xml.bind.annotation.XmlRootElement;
 
+import org.gitlab4j.api.utils.JacksonJson;
+
 @XmlRootElement
 @XmlAccessorType(XmlAccessType.FIELD)
 public class Pipeline {
@@ -145,4 +147,9 @@ public Integer getDuration() {
     public void setDuration(Integer duration) {
         this.duration = duration;
     }
+
+    @Override
+    public String toString() {
+        return (JacksonJson.toJsonString(this));
+    }
 }
diff --git a/src/main/java/org/gitlab4j/api/models/Project.java b/src/main/java/org/gitlab4j/api/models/Project.java
index 11a643891..8ab1a73ce 100644
--- a/src/main/java/org/gitlab4j/api/models/Project.java
+++ b/src/main/java/org/gitlab4j/api/models/Project.java
@@ -8,6 +8,7 @@
 import javax.xml.bind.annotation.XmlAccessorType;
 import javax.xml.bind.annotation.XmlRootElement;
 
+import org.gitlab4j.api.utils.JacksonJson;
 import org.gitlab4j.api.utils.JacksonJsonEnumHelper;
 
 import com.fasterxml.jackson.annotation.JsonCreator;
@@ -633,4 +634,8 @@ public static final boolean isValid(Project project) {
         return (project != null && project.getId() != null);
     }
 
+    @Override
+    public String toString() {
+        return (JacksonJson.toJsonString(this));
+    }
 }
diff --git a/src/main/java/org/gitlab4j/api/models/ProjectAccess.java b/src/main/java/org/gitlab4j/api/models/ProjectAccess.java
index 805eb6ca2..58cd3c5dd 100644
--- a/src/main/java/org/gitlab4j/api/models/ProjectAccess.java
+++ b/src/main/java/org/gitlab4j/api/models/ProjectAccess.java
@@ -3,6 +3,8 @@
 import javax.xml.bind.annotation.XmlAccessType;
 import javax.xml.bind.annotation.XmlAccessorType;
 
+import org.gitlab4j.api.utils.JacksonJson;
+
 @XmlAccessorType (XmlAccessType.FIELD)
 public class ProjectAccess {
 
@@ -24,4 +26,9 @@ public int getNotificationLevel() {
     public void setNotificationLevel(int notificationLevel) {
         this.notificationLevel = notificationLevel;
     }
+
+    @Override
+    public String toString() {
+        return (JacksonJson.toJsonString(this));
+    }
 }
diff --git a/src/main/java/org/gitlab4j/api/models/ProjectHook.java b/src/main/java/org/gitlab4j/api/models/ProjectHook.java
index b49fdfc34..c0887f562 100644
--- a/src/main/java/org/gitlab4j/api/models/ProjectHook.java
+++ b/src/main/java/org/gitlab4j/api/models/ProjectHook.java
@@ -7,6 +7,8 @@
 import javax.xml.bind.annotation.XmlAccessorType;
 import javax.xml.bind.annotation.XmlRootElement;
 
+import org.gitlab4j.api.utils.JacksonJson;
+
 import com.fasterxml.jackson.annotation.JsonIgnore;
 
 @XmlRootElement
@@ -269,4 +271,9 @@ public Boolean getWiki_page_events() {
     public void setWiki_page_events(Boolean wikiPageEvents) {
         this.wikiPageEvents = wikiPageEvents;
     }
+
+    @Override
+    public String toString() {
+        return (JacksonJson.toJsonString(this));
+    }
 }
\ No newline at end of file
diff --git a/src/main/java/org/gitlab4j/api/models/ProjectSharedGroup.java b/src/main/java/org/gitlab4j/api/models/ProjectSharedGroup.java
index 52441b17e..9558640e8 100644
--- a/src/main/java/org/gitlab4j/api/models/ProjectSharedGroup.java
+++ b/src/main/java/org/gitlab4j/api/models/ProjectSharedGroup.java
@@ -3,6 +3,8 @@
 import javax.xml.bind.annotation.XmlAccessType;
 import javax.xml.bind.annotation.XmlAccessorType;
 
+import org.gitlab4j.api.utils.JacksonJson;
+
 @XmlAccessorType(XmlAccessType.FIELD)
 public class ProjectSharedGroup {
  
@@ -33,4 +35,9 @@ public AccessLevel getGroupAccessLevel() {
     public void setGroupAccessLevel(AccessLevel accessLevel) {
         this.groupAccessLevel = accessLevel;
     }
+
+    @Override
+    public String toString() {
+        return (JacksonJson.toJsonString(this));
+    }
 }
diff --git a/src/main/java/org/gitlab4j/api/models/ProjectStatistics.java b/src/main/java/org/gitlab4j/api/models/ProjectStatistics.java
index 3f242a630..dfaa058c6 100644
--- a/src/main/java/org/gitlab4j/api/models/ProjectStatistics.java
+++ b/src/main/java/org/gitlab4j/api/models/ProjectStatistics.java
@@ -4,6 +4,8 @@
 import javax.xml.bind.annotation.XmlAccessType;
 import javax.xml.bind.annotation.XmlAccessorType;
 
+import org.gitlab4j.api.utils.JacksonJson;
+
 /**
  * This class contains the sizing information from the project. To get this information,
  * ProjectApi.getProject() has to be called with parameter statistics=true 
@@ -48,4 +50,9 @@ public void setLfsObjectSize(long lfsObjectSize) {
     public void setStorageSize(long storageSize) {
         this.storageSize = storageSize;
     }
+
+    @Override
+    public String toString() {
+        return (JacksonJson.toJsonString(this));
+    }
 }
diff --git a/src/main/java/org/gitlab4j/api/models/ProjectUser.java b/src/main/java/org/gitlab4j/api/models/ProjectUser.java
index 179458e6a..142d547b0 100644
--- a/src/main/java/org/gitlab4j/api/models/ProjectUser.java
+++ b/src/main/java/org/gitlab4j/api/models/ProjectUser.java
@@ -4,6 +4,8 @@
 import javax.xml.bind.annotation.XmlAccessorType;
 import javax.xml.bind.annotation.XmlRootElement;
 
+import org.gitlab4j.api.utils.JacksonJson;
+
 @XmlRootElement
 @XmlAccessorType(XmlAccessType.FIELD)
 public class ProjectUser {
@@ -62,4 +64,9 @@ public String getWebUrl() {
     public void setWebUrl(String webUrl) {
         this.webUrl = webUrl;
     }
+
+    @Override
+    public String toString() {
+        return (JacksonJson.toJsonString(this));
+    }
 }
diff --git a/src/main/java/org/gitlab4j/api/models/ProtectedBranch.java b/src/main/java/org/gitlab4j/api/models/ProtectedBranch.java
index d9f092b9e..534af6205 100644
--- a/src/main/java/org/gitlab4j/api/models/ProtectedBranch.java
+++ b/src/main/java/org/gitlab4j/api/models/ProtectedBranch.java
@@ -1,10 +1,13 @@
 
 package org.gitlab4j.api.models;
 
+import java.util.List;
+
 import javax.xml.bind.annotation.XmlAccessType;
 import javax.xml.bind.annotation.XmlAccessorType;
 import javax.xml.bind.annotation.XmlRootElement;
-import java.util.List;
+
+import org.gitlab4j.api.utils.JacksonJson;
 
 @XmlRootElement
 @XmlAccessorType(XmlAccessType.FIELD)
@@ -42,7 +45,6 @@ public static final boolean isValid(ProtectedBranch branch) {
         return (branch != null && branch.getName() != null);
     }
 
-
     public ProtectedBranch withName(String name) {
         this.name = name;
         return this;
@@ -57,4 +59,9 @@ public ProtectedBranch withMergeAccessLevels(List<BranchAccessLevel> mergeAccess
         this.mergeAccessLevels = mergeAccessLevels;
         return this;
     }
+
+    @Override
+    public String toString() {
+        return (JacksonJson.toJsonString(this));
+    }
 }
diff --git a/src/main/java/org/gitlab4j/api/models/PushData.java b/src/main/java/org/gitlab4j/api/models/PushData.java
index 8722b5980..11a7d480d 100644
--- a/src/main/java/org/gitlab4j/api/models/PushData.java
+++ b/src/main/java/org/gitlab4j/api/models/PushData.java
@@ -6,6 +6,7 @@
 import javax.xml.bind.annotation.XmlRootElement;
 
 import org.gitlab4j.api.Constants.ActionType;
+import org.gitlab4j.api.utils.JacksonJson;
 
 @XmlRootElement
 @XmlAccessorType(XmlAccessType.FIELD)
@@ -65,4 +66,9 @@ public String getRef() {
     public void setRef(String ref) {
         this.ref = ref;
     }
+
+    @Override
+    public String toString() {
+        return (JacksonJson.toJsonString(this));
+    }
 }
diff --git a/src/main/java/org/gitlab4j/api/models/PushRules.java b/src/main/java/org/gitlab4j/api/models/PushRules.java
index 8d6332ba4..7e573087a 100644
--- a/src/main/java/org/gitlab4j/api/models/PushRules.java
+++ b/src/main/java/org/gitlab4j/api/models/PushRules.java
@@ -6,6 +6,8 @@
 import javax.xml.bind.annotation.XmlAccessorType;
 import javax.xml.bind.annotation.XmlRootElement;
 
+import org.gitlab4j.api.utils.JacksonJson;
+
 @XmlRootElement
 @XmlAccessorType(XmlAccessType.FIELD)
 public class PushRules {
@@ -53,8 +55,8 @@ public void setCommitMessageRegex(String commitMessageRegex) {
     
     public PushRules withCommitMessageRegex(String commitMessageRegex) {
         this.commitMessageRegex = commitMessageRegex;
-    return (this);
- }
+        return (this);
+    }
 
     public String getBranchNameRegex() {
         return branchNameRegex;
@@ -66,8 +68,8 @@ public void setBranchNameRegex(String branchNameRegex) {
     
     public PushRules withBranchNameRegex(String branchNameRegex) {
         this.branchNameRegex = branchNameRegex;
-    return (this);
- }
+        return (this);
+    }
  
     public Boolean getDenyDeleteTag() {
         return denyDeleteTag;
@@ -79,8 +81,8 @@ public void setDenyDeleteTag(Boolean denyDeleteTag) {
     
     public PushRules withDenyDeleteTag(Boolean denyDeleteTag) {
         this.denyDeleteTag = denyDeleteTag;
-    return (this);
- }
+        return (this);
+    }
  
     public Date getCreatedAt() {
         return createdAt;
@@ -100,8 +102,8 @@ public void setMemberCheck(Boolean memberCheck) {
     
     public PushRules withMemberCheck(Boolean memberCheck) {
         this.memberCheck = memberCheck;
-    return (this);
- }
+        return (this);
+    }
  
     public Boolean getPreventSecrets() {
         return preventSecrets;
@@ -113,8 +115,8 @@ public void setPreventSecrets(Boolean preventSecrets) {
     
     public PushRules withPreventSecrets(Boolean preventSecrets) {
         this.preventSecrets = preventSecrets;
-    return (this);
- }
+        return (this);
+    }
  
     public String getAuthorEmailRegex() {
         return authorEmailRegex;
@@ -126,8 +128,8 @@ public void setAuthorEmailRegex(String authorEmailRegex) {
     
     public PushRules withAuthorEmailRegex(String authorEmailRegex) {
         this.authorEmailRegex = authorEmailRegex;
-    return (this);
- }
+        return (this);
+    }
  
     public String getFileNameRegex() {
         return fileNameRegex;
@@ -139,8 +141,8 @@ public void setFileNameRegex(String fileNameRegex) {
     
     public PushRules withFileNameRegex(String fileNameRegex) {
         this.fileNameRegex = fileNameRegex;
-    return (this);
- }
+        return (this);
+    }
  
     public Integer getMaxFileSize() {
         return maxFileSize;
@@ -152,6 +154,11 @@ public void setMaxFileSize(Integer maxFileSize) {
     
     public PushRules withMaxFileSize(Integer maxFileSize) {
         this.maxFileSize = maxFileSize;
-    return (this);
- }
+        return (this);
+    }
+
+    @Override
+    public String toString() {
+        return (JacksonJson.toJsonString(this));
+    }
  }
diff --git a/src/main/java/org/gitlab4j/api/models/Release.java b/src/main/java/org/gitlab4j/api/models/Release.java
index 46f7f191b..ecb56b288 100644
--- a/src/main/java/org/gitlab4j/api/models/Release.java
+++ b/src/main/java/org/gitlab4j/api/models/Release.java
@@ -4,6 +4,8 @@
 import javax.xml.bind.annotation.XmlAccessorType;
 import javax.xml.bind.annotation.XmlRootElement;
 
+import org.gitlab4j.api.utils.JacksonJson;
+
 @XmlRootElement
 @XmlAccessorType(XmlAccessType.FIELD)
 public class Release {
@@ -26,4 +28,9 @@ public String getDescription() {
     public void setDescription(String description) {
         this.description = description;
     }
+
+    @Override
+    public String toString() {
+        return (JacksonJson.toJsonString(this));
+    }
 }
diff --git a/src/main/java/org/gitlab4j/api/models/Repository.java b/src/main/java/org/gitlab4j/api/models/Repository.java
index 799af8acf..9fa08f4cb 100644
--- a/src/main/java/org/gitlab4j/api/models/Repository.java
+++ b/src/main/java/org/gitlab4j/api/models/Repository.java
@@ -4,6 +4,8 @@
 import javax.xml.bind.annotation.XmlAccessorType;
 import javax.xml.bind.annotation.XmlRootElement;
 
+import org.gitlab4j.api.utils.JacksonJson;
+
 @XmlRootElement
 @XmlAccessorType(XmlAccessType.FIELD)
 public class Repository {
@@ -44,4 +46,9 @@ public String getUrl() {
     public void setUrl(String url) {
         this.url = url;
     }
+
+    @Override
+    public String toString() {
+        return (JacksonJson.toJsonString(this));
+    }
 }
diff --git a/src/main/java/org/gitlab4j/api/models/RepositoryFile.java b/src/main/java/org/gitlab4j/api/models/RepositoryFile.java
index 33ad024ce..3137769ae 100644
--- a/src/main/java/org/gitlab4j/api/models/RepositoryFile.java
+++ b/src/main/java/org/gitlab4j/api/models/RepositoryFile.java
@@ -7,6 +7,8 @@
 import javax.xml.bind.annotation.XmlAccessorType;
 import javax.xml.bind.annotation.XmlRootElement;
 
+import org.gitlab4j.api.utils.JacksonJson;
+
 import com.fasterxml.jackson.annotation.JsonIgnore;
 
 @XmlRootElement
@@ -163,4 +165,9 @@ public void encodeAndSetContent(byte[] byteContent) {
         this.content = Base64.getEncoder().encodeToString(byteContent);
         encoding = "base64";
     }
+
+    @Override
+    public String toString() {
+        return (JacksonJson.toJsonString(this));
+    }
 }
diff --git a/src/main/java/org/gitlab4j/api/models/Runner.java b/src/main/java/org/gitlab4j/api/models/Runner.java
index acbe6c432..0d5ee5313 100644
--- a/src/main/java/org/gitlab4j/api/models/Runner.java
+++ b/src/main/java/org/gitlab4j/api/models/Runner.java
@@ -1,13 +1,15 @@
 package org.gitlab4j.api.models;
 
-import com.fasterxml.jackson.annotation.JsonCreator;
-import com.fasterxml.jackson.annotation.JsonValue;
-import org.gitlab4j.api.utils.JacksonJsonEnumHelper;
-
 import javax.xml.bind.annotation.XmlAccessType;
 import javax.xml.bind.annotation.XmlAccessorType;
 import javax.xml.bind.annotation.XmlRootElement;
 
+import org.gitlab4j.api.utils.JacksonJson;
+import org.gitlab4j.api.utils.JacksonJsonEnumHelper;
+
+import com.fasterxml.jackson.annotation.JsonCreator;
+import com.fasterxml.jackson.annotation.JsonValue;
+
 @XmlRootElement
 @XmlAccessorType(XmlAccessType.FIELD)
 public class Runner {
@@ -150,4 +152,9 @@ public Runner withIpAddress(String ipAddress) {
         this.ipAddress = ipAddress;
         return this;
     }
+
+    @Override
+    public String toString() {
+        return (JacksonJson.toJsonString(this));
+    }
 }
diff --git a/src/main/java/org/gitlab4j/api/models/RunnerDetail.java b/src/main/java/org/gitlab4j/api/models/RunnerDetail.java
index db45d2089..355626387 100644
--- a/src/main/java/org/gitlab4j/api/models/RunnerDetail.java
+++ b/src/main/java/org/gitlab4j/api/models/RunnerDetail.java
@@ -1,15 +1,17 @@
 package org.gitlab4j.api.models;
 
-import com.fasterxml.jackson.annotation.JsonCreator;
-import com.fasterxml.jackson.annotation.JsonValue;
-import org.gitlab4j.api.utils.JacksonJsonEnumHelper;
+import java.util.Date;
+import java.util.List;
 
 import javax.xml.bind.annotation.XmlAccessType;
 import javax.xml.bind.annotation.XmlAccessorType;
 import javax.xml.bind.annotation.XmlRootElement;
 
-import java.util.Date;
-import java.util.List;
+import org.gitlab4j.api.utils.JacksonJson;
+import org.gitlab4j.api.utils.JacksonJsonEnumHelper;
+
+import com.fasterxml.jackson.annotation.JsonCreator;
+import com.fasterxml.jackson.annotation.JsonValue;
 
 @XmlRootElement
 @XmlAccessorType(XmlAccessType.FIELD)
@@ -166,4 +168,9 @@ public RunnerDetail withAccessLevel(RunnerAccessLevel accessLevel) {
         this.accessLevel = accessLevel;
         return this;
     }
+
+    @Override
+    public String toString() {
+        return (JacksonJson.toJsonString(this));
+    }
 }
diff --git a/src/main/java/org/gitlab4j/api/models/Session.java b/src/main/java/org/gitlab4j/api/models/Session.java
index 6f96cf685..1bcb2105c 100644
--- a/src/main/java/org/gitlab4j/api/models/Session.java
+++ b/src/main/java/org/gitlab4j/api/models/Session.java
@@ -7,6 +7,8 @@
 import javax.xml.bind.annotation.XmlAccessorType;
 import javax.xml.bind.annotation.XmlRootElement;
 
+import org.gitlab4j.api.utils.JacksonJson;
+
 @XmlRootElement
 @XmlAccessorType(XmlAccessType.FIELD)
 public class Session {
@@ -227,4 +229,9 @@ public String getWebsiteUrl() {
     public void setWebsiteUrl(String websiteUrl) {
         this.websiteUrl = websiteUrl;
     }
+
+    @Override
+    public String toString() {
+        return (JacksonJson.toJsonString(this));
+    }
 }
diff --git a/src/main/java/org/gitlab4j/api/models/Snippet.java b/src/main/java/org/gitlab4j/api/models/Snippet.java
index 5361f65a4..bc0ca53b6 100644
--- a/src/main/java/org/gitlab4j/api/models/Snippet.java
+++ b/src/main/java/org/gitlab4j/api/models/Snippet.java
@@ -29,6 +29,8 @@
 import javax.xml.bind.annotation.XmlAccessorType;
 import javax.xml.bind.annotation.XmlRootElement;
 
+import org.gitlab4j.api.utils.JacksonJson;
+
 @XmlRootElement
 @XmlAccessorType(XmlAccessType.FIELD)
 public class Snippet {
@@ -156,4 +158,9 @@ public String getDescription() {
     public void setDescription(String description) {
         this.description = description;
     }
+
+    @Override
+    public String toString() {
+        return (JacksonJson.toJsonString(this));
+    }
 }
diff --git a/src/main/java/org/gitlab4j/api/models/SshKey.java b/src/main/java/org/gitlab4j/api/models/SshKey.java
index 0725f8f96..24235e49c 100644
--- a/src/main/java/org/gitlab4j/api/models/SshKey.java
+++ b/src/main/java/org/gitlab4j/api/models/SshKey.java
@@ -5,6 +5,8 @@
 import javax.xml.bind.annotation.XmlAccessType;
 import javax.xml.bind.annotation.XmlAccessorType;
 
+import org.gitlab4j.api.utils.JacksonJson;
+
 import com.fasterxml.jackson.annotation.JsonIgnore;
 
 @XmlAccessorType(XmlAccessType.FIELD)
@@ -57,4 +59,9 @@ public Integer getUserId() {
     public void setUserId(Integer userId) {
         this.userId = userId;
     }
+
+    @Override
+    public String toString() {
+        return (JacksonJson.toJsonString(this));
+    }
 }
diff --git a/src/main/java/org/gitlab4j/api/models/Tag.java b/src/main/java/org/gitlab4j/api/models/Tag.java
index 61badd4d9..b86ce6493 100644
--- a/src/main/java/org/gitlab4j/api/models/Tag.java
+++ b/src/main/java/org/gitlab4j/api/models/Tag.java
@@ -4,6 +4,8 @@
 import javax.xml.bind.annotation.XmlAccessorType;
 import javax.xml.bind.annotation.XmlRootElement;
 
+import org.gitlab4j.api.utils.JacksonJson;
+
 @XmlRootElement
 @XmlAccessorType(XmlAccessType.FIELD)
 public class Tag {
@@ -44,4 +46,9 @@ public Release getRelease() {
     public void setRelease(Release release) {
         this.release = release;
     }
+
+    @Override
+    public String toString() {
+        return (JacksonJson.toJsonString(this));
+    }
 }
diff --git a/src/main/java/org/gitlab4j/api/models/TimeStats.java b/src/main/java/org/gitlab4j/api/models/TimeStats.java
index 7f367970f..cc677c49e 100644
--- a/src/main/java/org/gitlab4j/api/models/TimeStats.java
+++ b/src/main/java/org/gitlab4j/api/models/TimeStats.java
@@ -4,6 +4,8 @@
 import javax.xml.bind.annotation.XmlAccessorType;
 import javax.xml.bind.annotation.XmlRootElement;
 
+import org.gitlab4j.api.utils.JacksonJson;
+
 @XmlRootElement
 @XmlAccessorType(XmlAccessType.FIELD)
 public class TimeStats {
@@ -44,4 +46,9 @@ public Duration getHumanTotalTimeSpent() {
     public void setHumanTotalTimeSpent(Duration humanTotalTimeSpent) {
         this.humanTotalTimeSpent = humanTotalTimeSpent;
     }
+
+    @Override
+    public String toString() {
+        return (JacksonJson.toJsonString(this));
+    }
 }
diff --git a/src/main/java/org/gitlab4j/api/models/TreeItem.java b/src/main/java/org/gitlab4j/api/models/TreeItem.java
index 1dddc37ba..21fb14731 100644
--- a/src/main/java/org/gitlab4j/api/models/TreeItem.java
+++ b/src/main/java/org/gitlab4j/api/models/TreeItem.java
@@ -4,6 +4,8 @@
 import javax.xml.bind.annotation.XmlAccessorType;
 import javax.xml.bind.annotation.XmlRootElement;
 
+import org.gitlab4j.api.utils.JacksonJson;
+
 @XmlRootElement
 @XmlAccessorType(XmlAccessType.FIELD)
 public class TreeItem {
@@ -61,4 +63,9 @@ public Type getType() {
     public void setType(Type type) {
         this.type = type;
     }
+
+    @Override
+    public String toString() {
+        return (JacksonJson.toJsonString(this));
+    }
 }
diff --git a/src/main/java/org/gitlab4j/api/models/User.java b/src/main/java/org/gitlab4j/api/models/User.java
index 32eeb0345..4124775cd 100644
--- a/src/main/java/org/gitlab4j/api/models/User.java
+++ b/src/main/java/org/gitlab4j/api/models/User.java
@@ -2,6 +2,8 @@
 
 import javax.xml.bind.annotation.XmlRootElement;
 
+import org.gitlab4j.api.utils.JacksonJson;
+
 @XmlRootElement
 public class User extends AbstractUser<User> {
 
@@ -46,4 +48,8 @@ public User withSharedRunnersMinuteLimit(Integer sharedRunnersMinuteLimit) {
         return withSharedRunnersMinutesLimit(sharedRunnersMinuteLimit);
     }
 
+    @Override
+    public String toString() {
+        return (JacksonJson.toJsonString(this));
+    }
 }
diff --git a/src/main/java/org/gitlab4j/api/models/WikiPage.java b/src/main/java/org/gitlab4j/api/models/WikiPage.java
index 686d01a52..898e7c4de 100644
--- a/src/main/java/org/gitlab4j/api/models/WikiPage.java
+++ b/src/main/java/org/gitlab4j/api/models/WikiPage.java
@@ -27,6 +27,8 @@
 import javax.xml.bind.annotation.XmlAccessorType;
 import javax.xml.bind.annotation.XmlRootElement;
 
+import org.gitlab4j.api.utils.JacksonJson;
+
 @XmlRootElement
 @XmlAccessorType(XmlAccessType.FIELD)
 public class WikiPage {
@@ -76,4 +78,9 @@ public String getFormat() {
     public void setFormat(String format) {
         this.format = format;
     }
+
+    @Override
+    public String toString() {
+        return (JacksonJson.toJsonString(this));
+    }
 }