Index: src/Common/DelftTools.Utils/TextDocumentBase.cs
===================================================================
diff -u -rc681de56bb7c40d7c5802f2993feb4aa61c2e1d2 -r8edbe5e2130c81b456385607891c6ef98928f88e
--- src/Common/DelftTools.Utils/TextDocumentBase.cs	(.../TextDocumentBase.cs)	(revision c681de56bb7c40d7c5802f2993feb4aa61c2e1d2)
+++ src/Common/DelftTools.Utils/TextDocumentBase.cs	(.../TextDocumentBase.cs)	(revision 8edbe5e2130c81b456385607891c6ef98928f88e)
@@ -1,9 +1,10 @@
 using DelftTools.Utils.Aop;
+using DelftTools.Utils.Data;
 
 namespace DelftTools.Utils
 {
     [Entity(FireOnCollectionChange = false)]
-    public abstract class TextDocumentBase : INameable
+    public abstract class TextDocumentBase : EditableObjectUnique<long>, INameable
     {
         private readonly bool readOnly;