diff --git a/framework/src/main/java/de/hsadmin/module/property/mapping/ReferredStringPersistentObjectMapper.java b/framework/src/main/java/de/hsadmin/module/property/mapping/ReferredStringPersistentObjectMapper.java
index 385e68f..8c21869 100644
--- a/framework/src/main/java/de/hsadmin/module/property/mapping/ReferredStringPersistentObjectMapper.java
+++ b/framework/src/main/java/de/hsadmin/module/property/mapping/ReferredStringPersistentObjectMapper.java
@@ -31,8 +31,7 @@ public class ReferredStringPersistentObjectMapper implements PersistentObjectMap
 	@Override
 	public void writeValueToPersistentObject(final Object persistentObject,
 			final String propertyName, final String value) throws TechnicalException {
-		// TODO Auto-generated method stub
-		
+		throw new TechnicalException("writeValueToPersistentObject not implemented");
 	}
 
 }