treeViewer.setInput( new File( ReportPlugin.getDefault( ) .getResourcePreference( ) ) );
LibDirectoryNodeModel rootModel = new LibDirectoryNodeModel( ReportPlugin.getDefault( ).getResourcePreference( ) );  rootModel.setResourceListener( this );  treeViewer.setInput( rootModel );
	private void refreshRoot( )	{		treeViewer.setInput( new File( ReportPlugin.getDefault( )				.getResourcePreference( ) ) );	}