Destroy connection @AfterEach Test

Author: G8XSU

app/src/test/java/org/vss/impl/postgres/PostgresBackendImplIntegrationTest.java

@@ -5,6 +5,7 @@
 import org.jooq.DSLContext;
 import org.jooq.SQLDialect;
 import org.jooq.impl.DSL;
+import org.junit.jupiter.api.AfterEach;
 import org.junit.jupiter.api.BeforeEach;
 import org.testcontainers.containers.PostgreSQLContainer;
 import org.testcontainers.junit.jupiter.Container;
@@ -23,20 +24,27 @@ public class PostgresBackendImplIntegrationTest extends AbstractKVStoreIntegrati
           .withUsername("postgres")
           .withPassword("postgres");
 
+  private Connection connection;
+
   @BeforeEach
-  public void initEach() throws Exception {
+  void initEach() throws Exception {
 
     // This is required to get postgres driver in classpath before we attempt to fetch a connection
     Class.forName("org.postgresql.Driver");
-    Connection conn = DriverManager.getConnection(postgreSQLContainer.getJdbcUrl(),
+    this.connection = DriverManager.getConnection(postgreSQLContainer.getJdbcUrl(),
         postgreSQLContainer.getUsername(), postgreSQLContainer.getPassword());
-    DSLContext dslContext = DSL.using(conn, SQLDialect.POSTGRES);
+    DSLContext dslContext = DSL.using(connection, SQLDialect.POSTGRES);
 
     this.kvStore = new PostgresBackendImpl(dslContext);
 
     createTable(dslContext);
   }
 
+  @AfterEach
+  void destroy() throws Exception {
+    this.connection.close();
+  }
+
   private void createTable(DSLContext dslContext) {
     dslContext.execute("CREATE TABLE vss_db ("
         + "store_id character varying(120)  NOT NULL CHECK (store_id <> ''),"