Bug 11748 switch to new DecoratorManager API
From the workbench change notes: API changes IWorkbenchPartSite.getDecoratorManager() - As the DecoratorManager has proven to be required for more than just IWorkbenchPartSites we have moved getDecoratorManager() to IWorkbench and deprecated the getDecoratorManager() in IWorkbenchPartSite. The one in IWorkbenchPartSite will be removed after the other Eclipse components have had a chance to switch to the new API.
org.eclipse.jdt.ui/ui/org/eclipse/jdt/internal/ui/packageview/PackageExplorerPart.java
import org.eclipse.jdt.internal.ui.dnd.LocalSelectionTransfer;
import org.eclipse.jdt.internal.ui.dnd.ResourceTransferDragAdapter;
import org.eclipse.jdt.internal.ui.dnd.TransferDragSourceListener;
import org.eclipse.jdt.internal.ui.dnd.TransferDropTargetListener;
import org.eclipse.jdt.internal.ui.javaeditor.EditorUtility;
import org.eclipse.jdt.internal.ui.javaeditor.IClassFileEditorInput;
import org.eclipse.jdt.internal.ui.javaeditor.JarEntryEditorInput;
import org.eclipse.jdt.internal.ui.preferences.JavaBasePreferencePage;
import org.eclipse.jdt.internal.ui.refactoring.actions.IRefactoringAction;
import org.eclipse.jdt.internal.ui.refactoring.actions.RefactoringGroup;
import org.eclipse.jdt.internal.ui.reorg.ReorgGroup;
import org.eclipse.jdt.internal.ui.search.JavaSearchGroup;
import org.eclipse.jdt.internal.ui.util.JavaUIHelp;
import org.eclipse.jdt.internal.ui.util.OpenTypeHierarchyUtil;
import org.eclipse.jdt.internal.ui.viewsupport.JavaElementImageProvider;
import org.eclipse.jdt.internal.ui.viewsupport.JavaElementLabels;
import org.eclipse.jdt.internal.ui.viewsupport.MemberFilterActionGroup;
import org.eclipse.jdt.internal.ui.viewsupport.ProblemTreeViewer;
import org.eclipse.jdt.internal.ui.viewsupport.StandardJavaUILabelProvider;
import org.eclipse.jdt.internal.ui.viewsupport.StatusBarUpdater;
/**
 * The ViewPart for the ProjectExplorer. It listens to part activation events.
 * When selection linking with the editor is enabled the view selection tracks
 * the active editor page. Similarly when a resource is selected in the packages
 * view the corresponding editor is activated. 
 */
public class PackageExplorerPart extends ViewPart implements ISetSelectionTarget, IMenuListener, IPackagesViewPart,  IPropertyChangeListener {
	
	public final static String VIEW_ID= JavaUI.ID_PACKAGES;