Bug 123316 [Undo] - API BEHAVIOR - should always place a successfully undone/redone op on the redo/undo history
bundles/org.eclipse.core.commands/src/org/eclipse/core/commands/operations/DefaultOperationHistory.java
openComposite.add(operation);
				merging = true;
			}
		}
		/*
		 * Execute the operation
		 */
		if (!merging)
			notifyAboutToExecute(operation);
		try {
			status = operation.execute(monitor, info);
		} catch (OperationCanceledException e) {
			status = Status.CANCEL_STATUS;
		} catch (ExecutionException e) {
			notifyNotOK(operation);
			throw e;
		} catch (Exception e) {
			notifyNotOK(operation);
			throw new ExecutionException(
					"While executing the operation, an exception occurred", e); 
		}
		
		
		if (!merging) {
			if (status.isOK()) {
				notifyDone(operation);