diff --git a/src/com/magento/idea/magento2plugin/actions/generation/dialog/CreateAPluginDialog.java b/src/com/magento/idea/magento2plugin/actions/generation/dialog/CreateAPluginDialog.java
index 2232581e4..8defb8b7d 100644
--- a/src/com/magento/idea/magento2plugin/actions/generation/dialog/CreateAPluginDialog.java
+++ b/src/com/magento/idea/magento2plugin/actions/generation/dialog/CreateAPluginDialog.java
@@ -13,6 +13,7 @@
 import com.magento.idea.magento2plugin.actions.generation.data.PluginFileData;
 import com.magento.idea.magento2plugin.actions.generation.dialog.validator.annotation.FieldValidation;
 import com.magento.idea.magento2plugin.actions.generation.dialog.validator.annotation.RuleRegistry;
+import com.magento.idea.magento2plugin.actions.generation.dialog.validator.rule.BoxNotEmptyRule;
 import com.magento.idea.magento2plugin.actions.generation.dialog.validator.rule.DirectoryRule;
 import com.magento.idea.magento2plugin.actions.generation.dialog.validator.rule.IdentifierRule;
 import com.magento.idea.magento2plugin.actions.generation.dialog.validator.rule.NotEmptyRule;
@@ -65,6 +66,8 @@ public class CreateAPluginDialog extends AbstractDialog {
 
     @FieldValidation(rule = RuleRegistry.NOT_EMPTY,
             message = {NotEmptyRule.MESSAGE, TARGET_MODULE})
+    @FieldValidation(rule = RuleRegistry.BOX_NOT_EMPTY,
+            message = {BoxNotEmptyRule.MESSAGE, TARGET_MODULE})
     private FilteredComboBox pluginModule;
 
     @FieldValidation(rule = RuleRegistry.NOT_EMPTY,
diff --git a/src/com/magento/idea/magento2plugin/actions/generation/dialog/CreateAnObserverDialog.java b/src/com/magento/idea/magento2plugin/actions/generation/dialog/CreateAnObserverDialog.java
index 2cb2ef782..83ecc0553 100644
--- a/src/com/magento/idea/magento2plugin/actions/generation/dialog/CreateAnObserverDialog.java
+++ b/src/com/magento/idea/magento2plugin/actions/generation/dialog/CreateAnObserverDialog.java
@@ -13,6 +13,7 @@
 import com.magento.idea.magento2plugin.actions.generation.dialog.validator.annotation.FieldValidation;
 import com.magento.idea.magento2plugin.actions.generation.dialog.validator.annotation.RuleRegistry;
 import com.magento.idea.magento2plugin.actions.generation.dialog.validator.rule.AlphanumericWithUnderscoreRule;
+import com.magento.idea.magento2plugin.actions.generation.dialog.validator.rule.BoxNotEmptyRule;
 import com.magento.idea.magento2plugin.actions.generation.dialog.validator.rule.DirectoryRule;
 import com.magento.idea.magento2plugin.actions.generation.dialog.validator.rule.NotEmptyRule;
 import com.magento.idea.magento2plugin.actions.generation.dialog.validator.rule.PhpClassRule;
@@ -63,6 +64,8 @@ public class CreateAnObserverDialog extends AbstractDialog {
 
     @FieldValidation(rule = RuleRegistry.NOT_EMPTY,
             message = {NotEmptyRule.MESSAGE, OBSERVER_MODULE})
+    @FieldValidation(rule = RuleRegistry.BOX_NOT_EMPTY,
+            message = {BoxNotEmptyRule.MESSAGE, OBSERVER_MODULE})
     private FilteredComboBox observerModule;
 
     @FieldValidation(rule = RuleRegistry.NOT_EMPTY,
diff --git a/src/com/magento/idea/magento2plugin/actions/generation/dialog/OverrideClassByAPreferenceDialog.java b/src/com/magento/idea/magento2plugin/actions/generation/dialog/OverrideClassByAPreferenceDialog.java
index dab6ddc8f..3640671b1 100644
--- a/src/com/magento/idea/magento2plugin/actions/generation/dialog/OverrideClassByAPreferenceDialog.java
+++ b/src/com/magento/idea/magento2plugin/actions/generation/dialog/OverrideClassByAPreferenceDialog.java
@@ -14,6 +14,7 @@
 import com.magento.idea.magento2plugin.actions.generation.data.PreferenceFileData;
 import com.magento.idea.magento2plugin.actions.generation.dialog.validator.annotation.FieldValidation;
 import com.magento.idea.magento2plugin.actions.generation.dialog.validator.annotation.RuleRegistry;
+import com.magento.idea.magento2plugin.actions.generation.dialog.validator.rule.BoxNotEmptyRule;
 import com.magento.idea.magento2plugin.actions.generation.dialog.validator.rule.DirectoryRule;
 import com.magento.idea.magento2plugin.actions.generation.dialog.validator.rule.NotEmptyRule;
 import com.magento.idea.magento2plugin.actions.generation.dialog.validator.rule.PhpClassRule;
@@ -65,6 +66,8 @@ public class OverrideClassByAPreferenceDialog extends AbstractDialog { //NOPMD
 
     @FieldValidation(rule = RuleRegistry.NOT_EMPTY,
             message = {NotEmptyRule.MESSAGE, MODULE})
+    @FieldValidation(rule = RuleRegistry.BOX_NOT_EMPTY,
+            message = {BoxNotEmptyRule.MESSAGE, MODULE})
     private FilteredComboBox preferenceModule;
 
     @FieldValidation(rule = RuleRegistry.NOT_EMPTY,