diff --git a/scm-core/src/main/java/sonia/scm/ModelObject.java b/scm-core/src/main/java/sonia/scm/ModelObject.java
index 55ae650e46..69dc519d2c 100644
--- a/scm-core/src/main/java/sonia/scm/ModelObject.java
+++ b/scm-core/src/main/java/sonia/scm/ModelObject.java
@@ -43,4 +43,14 @@ import java.io.Serializable;
  */
 public interface ModelObject
         extends TypedObject, LastModifiedAware, Cloneable, Validateable,
-                Serializable {}
+                Serializable
+{
+
+  /**
+   * Method description
+   *
+   *
+   * @return
+   */
+  public String getId();
+}
diff --git a/scm-core/src/main/java/sonia/scm/group/Group.java b/scm-core/src/main/java/sonia/scm/group/Group.java
index 6dc92801df..89496051c4 100644
--- a/scm-core/src/main/java/sonia/scm/group/Group.java
+++ b/scm-core/src/main/java/sonia/scm/group/Group.java
@@ -363,6 +363,18 @@ public class Group implements ModelObject, Iterable<String>
     return description;
   }
 
+  /**
+   * Method description
+   *
+   *
+   * @return
+   */
+  @Override
+  public String getId()
+  {
+    return name;
+  }
+
   /**
    * Method description
    *
diff --git a/scm-core/src/main/java/sonia/scm/user/User.java b/scm-core/src/main/java/sonia/scm/user/User.java
index 67f8b599c6..0e37d00c8a 100644
--- a/scm-core/src/main/java/sonia/scm/user/User.java
+++ b/scm-core/src/main/java/sonia/scm/user/User.java
@@ -328,6 +328,18 @@ public class User implements Principal, ModelObject
     return displayName;
   }
 
+  /**
+   * Method description
+   *
+   *
+   * @return
+   */
+  @Override
+  public String getId()
+  {
+    return name;
+  }
+
   /**
    * Method description
    *