diff --git a/core/che-core-typescript-dto-maven-plugin/src/main/java/org/eclipse/che/plugin/typescript/dto/model/DtoModel.java b/core/che-core-typescript-dto-maven-plugin/src/main/java/org/eclipse/che/plugin/typescript/dto/model/DtoModel.java
index 980a9840d4..ed8386d22b 100644
--- a/core/che-core-typescript-dto-maven-plugin/src/main/java/org/eclipse/che/plugin/typescript/dto/model/DtoModel.java
+++ b/core/che-core-typescript-dto-maven-plugin/src/main/java/org/eclipse/che/plugin/typescript/dto/model/DtoModel.java
@@ -75,13 +75,17 @@ public class DtoModel {
               .filter(method -> !method.isBridge() && (isDtoGetter(method) || isDtoSetter(method) || isDtoWith(method)))
               .forEach(method -> {
                   MethodModel methodModel = new MethodModel(method);
-                  methods.add(methodModel);
-                  if (isDtoGetter(method)) {
-                      analyzeDtoGetterMethod(method, methodModel);
-                  } else if (isDtoSetter(method)) {
-                      analyzeDtoSetterMethod(method, methodModel);
-                  } else if (isDtoWith(method)) {
-                      analyzeDtoWithMethod(method, methodModel);
+
+                  // check method with same name already exist
+                  if (!methods.contains(methodModel)) {
+                      methods.add(methodModel);
+                      if (isDtoGetter(method)) {
+                          analyzeDtoGetterMethod(method, methodModel);
+                      } else if (isDtoSetter(method)) {
+                          analyzeDtoSetterMethod(method, methodModel);
+                      } else if (isDtoWith(method)) {
+                          analyzeDtoWithMethod(method, methodModel);
+                      }
                   }
               });
 
diff --git a/core/che-core-typescript-dto-maven-plugin/src/main/java/org/eclipse/che/plugin/typescript/dto/model/MethodModel.java b/core/che-core-typescript-dto-maven-plugin/src/main/java/org/eclipse/che/plugin/typescript/dto/model/MethodModel.java
index 8ddad316e7..974851d88b 100644
--- a/core/che-core-typescript-dto-maven-plugin/src/main/java/org/eclipse/che/plugin/typescript/dto/model/MethodModel.java
+++ b/core/che-core-typescript-dto-maven-plugin/src/main/java/org/eclipse/che/plugin/typescript/dto/model/MethodModel.java
@@ -12,9 +12,11 @@ package org.eclipse.che.plugin.typescript.dto.model;
 
 import java.lang.reflect.Method;
 import java.util.ArrayList;
+import java.util.Arrays;
 import java.util.List;
 import java.util.stream.IntStream;
 
+import static java.util.Objects.hash;
 import static org.eclipse.che.plugin.typescript.dto.DTOHelper.convertType;
 
 /**
@@ -143,4 +145,21 @@ public class MethodModel {
     public String getFieldType() {
         return fieldType;
     }
+
+    public int hashCode() {
+        return hash(this.parameters.toString(), this.returnType);
+    }
+
+    public boolean equals(Object other) {
+        if (other == null) {
+            return false;
+        }
+        if (!(other instanceof MethodModel)) {
+            return false;
+        }
+        MethodModel methodModelOther = (MethodModel) other;
+        return this.getName().equals(methodModelOther.getName())
+               && this.returnType.equals(methodModelOther.returnType)
+               && Arrays.equals(this.parameters.toArray(), methodModelOther.parameters.toArray());
+    }
 }
\ No newline at end of file
diff --git a/core/che-core-typescript-dto-maven-plugin/src/main/java/org/eclipse/che/plugin/typescript/dto/model/ParameterMethodModel.java b/core/che-core-typescript-dto-maven-plugin/src/main/java/org/eclipse/che/plugin/typescript/dto/model/ParameterMethodModel.java
index 9177d8644a..7cf1d0a09f 100644
--- a/core/che-core-typescript-dto-maven-plugin/src/main/java/org/eclipse/che/plugin/typescript/dto/model/ParameterMethodModel.java
+++ b/core/che-core-typescript-dto-maven-plugin/src/main/java/org/eclipse/che/plugin/typescript/dto/model/ParameterMethodModel.java
@@ -10,6 +10,8 @@
  *******************************************************************************/
 package org.eclipse.che.plugin.typescript.dto.model;
 
+import static java.util.Objects.hash;
+
 /**
  * Defines the model link to parameter of a method
  *
@@ -58,4 +60,24 @@ public class ParameterMethodModel {
         return this.parameterType;
     }
 
+    public int hashCode() {
+        return hash(this.parameterName, this.parameterType);
+    }
+
+    public boolean equals(Object other) {
+        if (other == null) {
+            return false;
+        }
+        if (!(other instanceof ParameterMethodModel)) {
+            return false;
+        }
+        ParameterMethodModel parameterMethodModelOther = (ParameterMethodModel) other;
+        return this.parameterName.equals(parameterMethodModelOther.parameterName) && this.parameterType.equals(((ParameterMethodModel)other).parameterType);
+    }
+
+    public String toString() {
+        return "ParameterMethodModel[" + this.parameterName + "/" + this.parameterType + "]";
+    }
+
+
 }
diff --git a/core/che-core-typescript-dto-maven-plugin/src/test/java/org/eclipse/che/plugin/typescript/dto/MyOtherDTO.java b/core/che-core-typescript-dto-maven-plugin/src/test/java/org/eclipse/che/plugin/typescript/dto/MyOtherDTO.java
index eb5a0780b8..35dcb9aba0 100644
--- a/core/che-core-typescript-dto-maven-plugin/src/test/java/org/eclipse/che/plugin/typescript/dto/MyOtherDTO.java
+++ b/core/che-core-typescript-dto-maven-plugin/src/test/java/org/eclipse/che/plugin/typescript/dto/MyOtherDTO.java
@@ -16,9 +16,8 @@ import org.eclipse.che.dto.shared.DTO;
  * @author Florent Benoit
  */
 @DTO
-public interface MyOtherDTO {
+public interface MyOtherDTO extends MySuperClassDTO, MySuperSuperClass {
 
-    String getName();
     void setName(String name);
     MyOtherDTO withName(String name);
 
diff --git a/core/che-core-typescript-dto-maven-plugin/src/test/java/org/eclipse/che/plugin/typescript/dto/MySuperClassDTO.java b/core/che-core-typescript-dto-maven-plugin/src/test/java/org/eclipse/che/plugin/typescript/dto/MySuperClassDTO.java
new file mode 100644
index 0000000000..02b578c9e0
--- /dev/null
+++ b/core/che-core-typescript-dto-maven-plugin/src/test/java/org/eclipse/che/plugin/typescript/dto/MySuperClassDTO.java
@@ -0,0 +1,31 @@
+/*******************************************************************************
+ * Copyright (c) 2012-2016 Codenvy, S.A.
+ * All rights reserved. This program and the accompanying materials
+ * are made available under the terms of the Eclipse Public License v1.0
+ * which accompanies this distribution, and is available at
+ * http://www.eclipse.org/legal/epl-v10.html
+ *
+ * Contributors:
+ *   Codenvy, S.A. - initial API and implementation
+ *******************************************************************************/
+package org.eclipse.che.plugin.typescript.dto;
+
+import org.eclipse.che.api.core.factory.FactoryParameter;
+import org.eclipse.che.dto.shared.DTO;
+
+import static org.eclipse.che.api.core.factory.FactoryParameter.Obligation.OPTIONAL;
+
+/**
+ * @author Florent Benoit
+ */
+@DTO
+public interface MySuperClassDTO extends MySuperSuperClass {
+
+    @Override
+    @FactoryParameter(obligation = OPTIONAL)
+    String getName();
+
+    void setName(String name);
+    MySuperClassDTO withName(String name);
+
+}
diff --git a/core/che-core-typescript-dto-maven-plugin/src/test/java/org/eclipse/che/plugin/typescript/dto/MySuperSuperClass.java b/core/che-core-typescript-dto-maven-plugin/src/test/java/org/eclipse/che/plugin/typescript/dto/MySuperSuperClass.java
new file mode 100644
index 0000000000..1575bf75ad
--- /dev/null
+++ b/core/che-core-typescript-dto-maven-plugin/src/test/java/org/eclipse/che/plugin/typescript/dto/MySuperSuperClass.java
@@ -0,0 +1,20 @@
+/*******************************************************************************
+ * Copyright (c) 2012-2016 Codenvy, S.A.
+ * All rights reserved. This program and the accompanying materials
+ * are made available under the terms of the Eclipse Public License v1.0
+ * which accompanies this distribution, and is available at
+ * http://www.eclipse.org/legal/epl-v10.html
+ *
+ * Contributors:
+ *   Codenvy, S.A. - initial API and implementation
+ *******************************************************************************/
+package org.eclipse.che.plugin.typescript.dto;
+
+/**
+ * @author Florent Benoit
+ */
+public interface MySuperSuperClass {
+
+    String getName();
+
+}