Bug 31818 [navigation] Open Type Hierarchy loses selection
build I20030211 - open a CU (e.g. BookmarkNavigator.java) - position the cursor between methods - F4 - it opens the type hierarchy on the class, but also changes the text editor's selection to select the class name It should not affect the text editor selection.
org.eclipse.jdt.ui/ui/org/eclipse/jdt/internal/ui/typehierarchy/TypeHierarchyViewPart.java
}	
		addDragAdapters(fMethodsViewer, ops, transfers);
		
		DropTarget dropTarget = new DropTarget(fNoHierarchyShownLabel, ops | DND.DROP_DEFAULT);
		dropTarget.setTransfer(transfers);
		dropTarget.addDropListener(new TypeHierarchyTransferDropAdapter(this, fAllViewers[0]));
	}
	
	private void addDropAdapters(AbstractTreeViewer viewer, int ops, Transfer[] transfers){
		TransferDropTargetListener[] dropListeners= new TransferDropTargetListener[] {
			new TypeHierarchyTransferDropAdapter(this, viewer)
		};
		viewer.addDropSupport(ops, transfers, new DelegatingDropAdapter(dropListeners));
	}
	private void addDragAdapters(StructuredViewer viewer, int ops, Transfer[] transfers) {
		TransferDragSourceListener[] dragListeners= new TransferDragSourceListener[] {
			new SelectionTransferDragAdapter(viewer)
		};
		viewer.addDragSupport(ops, transfers, new JdtViewerDragAdapter(viewer, dragListeners));
	}	
			
	/**
	 * Returns the inner component in a workbench part.
	 * @see IWorkbenchPart#createPartControl(Composite)
	 */
	public void createPartControl(Composite container) {
						
		fPagebook= new PageBook(container, SWT.NONE);
		fWorkingSetActionGroup= new WorkingSetFilterActionGroup(JavaUI.ID_TYPE_HIERARCHY, container.getShell(), fPropertyChangeListener);