this.jTreeDatabase.setModel(new javax.swing.tree.DefaultTreeModel(new javax.swing.tree.DefaultMutableTreeNode("Error...")));
}
// new DatabaseTransferHandler().register(jTreeDatabase);
// enable dragging for the tree.
new DragHelper(new ReverseDbNodesDragWorker()).registerComponent(jTreeDatabase);
// enable dropping for the tree.
DropTargetHelper helper = new DropTargetHelper();
helper.registerDropPasteWorker (new ReverseDbNodesDropWorker());
jTreeDatabase.setDropTarget(helper.getDropTarget ());