Bug 10458 Support DND to set focus in Hierarchy View
Please enable Hierarchy view to support DND as a way to "focus on" something, whether it be a project, source folder, package, or type.
org.eclipse.jdt.ui/ui/org/eclipse/jdt/internal/ui/util/OpenTypeHierarchyUtil.java
return null;
	}	
	
	public static TypeHierarchyViewPart open(IJavaElement[] candidates, IWorkbenchWindow window) {
		return open(candidates, window, 0);	
	}
	
	public static TypeHierarchyViewPart open(IJavaElement[] candidates, IWorkbenchWindow window, int  mask) {
		Assert.isTrue(candidates != null && candidates.length != 0);
			
		IJavaElement input= null;
		if (candidates.length > 1) {
			input= selectCandidate(candidates, window.getShell());
		} else {
			input= candidates[0];
		}
		if (input == null)
			return null;
			
		try {
			if (JavaBasePreferencePage.openTypeHierarchyInPerspective()) {
				return openInPerspective(window, input, mask);
			} else {
				return openInViewPart(window, input);
			}
				
		} catch (WorkbenchException e) {
			JavaPlugin.log(e);
			MessageDialog.openError(window.getShell(),
				JavaUIMessages.getString("OpenTypeHierarchyUtil.error.open_perspective"),