Bug 315281 update copyrights for 3.6
bundles/org.eclipse.jface/src/org/eclipse/jface/viewers/TreeViewerFocusCellManager.java
* </ul>
	 *
	 * @param viewer
	 *            the viewer the manager is bound to
	 * @param focusDrawingDelegate
	 *            the delegate responsible to highlight selected cell
	 */
	public TreeViewerFocusCellManager(TreeViewer viewer,
			FocusCellHighlighter focusDrawingDelegate) {
		this(viewer, focusDrawingDelegate, TREE_NAVIGATE);
	}
	/**
	 * Create a new manager with a custom navigation strategy
	 *
	 * @param viewer
	 *            the viewer the manager is bound to
	 * @param focusDrawingDelegate
	 *            the delegate responsible to highlight selected cell
	 * @param navigationStrategy
	 *            the strategy used to navigate the cells
	 * @since 3.4
	 */
	public TreeViewerFocusCellManager(TreeViewer viewer,
			FocusCellHighlighter focusDrawingDelegate,
			CellNavigationStrategy navigationStrategy) {
		super(viewer, focusDrawingDelegate, navigationStrategy);
	}
	ViewerCell getInitialFocusCell() {
		Tree tree = (Tree) getViewer().getControl();
		if (! tree.isDisposed() && tree.getItemCount() > 0 && ! tree.getTopItem().isDisposed()) {