making IdentityWrapper serializable

java/com.sap.sse/src/com/sap/sse/util/IdentityWrapper.java

@@ -1,5 +1,7 @@
 package com.sap.sse.util;
 
+import java.io.Serializable;
+
 /**
  * Implements {@link Object#equals(Object)} and {@link Object#hashCode()} based on the wrapped object's
  * identity, no matter what the object itself defines as {@code equals} and {@code hashCode}.
@@ -7,7 +9,8 @@ package com.sap.sse.util;
  * @author Axel Uhl (D043530)
  *
  */
-public class IdentityWrapper<T> {
+public class IdentityWrapper<T> implements Serializable {
+    private static final long serialVersionUID = 3514488568026067341L;
     private final T t;
     
     public IdentityWrapper(T t) {