Bug 32656 Open/Close project in package explorer looses selection on java-projects. [package explorer]
Not on non-java projects, which looks wrong when multiple java- and non-java-projects are opened/closed.
org.eclipse.jdt.ui/ui/org/eclipse/jdt/internal/ui/packageview/PackageExplorerPart.java
};
		fViewer.addDropSupport(ops | DND.DROP_DEFAULT, transfers, new DelegatingDropAdapter(dropListeners));
		
		
		Control control= fViewer.getControl();
		TransferDragSourceListener[] dragListeners= new TransferDragSourceListener[] {
			new SelectionTransferDragAdapter(fViewer),
			new ResourceTransferDragAdapter(fViewer),
			new FileTransferDragAdapter(fViewer)
		};
		DragSource source= new DragSource(control, ops);
		
		source.addDragListener(new DelegatingDragAdapter(dragListeners) {
			public void dragStart(DragSourceEvent event) {
				IStructuredSelection selection= (IStructuredSelection)getSelection();
				if (selection.isEmpty()) {
					event.doit= false;
					return; 
				}
				for (Iterator iter= selection.iterator(); iter.hasNext(); ) {
					if (iter.next() instanceof IMember) {
						setPossibleListeners(new TransferDragSourceListener[] {new SelectionTransferDragAdapter(fViewer)});
						break;
					}
				}
				super.dragStart(event);
			}
		});
	}
	/**