/**
	 * when opening a diagram from the common navigator view the given input has wron type. need to convert 
	 */
	public void doSetInput(IEditorInput input, boolean releaseEditorContents) throws CoreException {
		if (input instanceof FileEditorInput)
		{
			FileEditorInput fei = (FileEditorInput)input;
			fei.getURI();
			
			URI uri = URI.createURI(fei.getURI().toString());
			input = new URIEditorInput(uri);
		}
		super.doSetInput (input, releaseEditorContents);
	}