--- a/Core/SQLite/Transaction.h	Fri Dec 05 11:11:58 2014 +0100
+++ b/Core/SQLite/Transaction.h	Fri Dec 05 14:31:46 2014 +0100
@@ -38,12 +38,13 @@
 #pragma once
 
 #include "Connection.h"
+#include "ITransaction.h"
 
 namespace Orthanc
 {
   namespace SQLite
   {
-    class Transaction : public NonCopyable
+    class Transaction : public ITransaction
     {
     private:
       Connection& connection_;
@@ -54,22 +55,17 @@
 
     public:
       explicit Transaction(Connection& connection);
-      ~Transaction();
+
+      virtual ~Transaction();
 
       // Returns true when there is a transaction that has been successfully begun.
       bool IsOpen() const { return isOpen_; }
 
-      // Begins the transaction. This uses the default sqlite "deferred" transaction
-      // type, which means that the DB lock is lazily acquired the next time the
-      // database is accessed, not in the begin transaction command.
-      void Begin();
+      virtual void Begin();
 
-      // Rolls back the transaction. This will happen automatically if you do
-      // nothing when the transaction goes out of scope.
-      void Rollback();
+      virtual void Rollback();
 
-      // Commits the transaction, returning true on success.
-      void Commit();
+      virtual void Commit();
     };
   }
 }