rootNode.setData( new DbObject( "", DbObject.ROOT_NODE_TYPE ) );
	protected void setRootElement( )	{		rootNode = new TreeItem( availableDbObjectsTree, SWT.NONE );		rootNode.setImage( dataBaseImage );		DataSourceDesign dataSourceHandle = this.getDataSetDesign( )				.getDataSourceDesign( );		rootNode.setText( dataSourceHandle.getName( ) );	}