Bug 5765 New Class button in empty workspace should be more supportive
User feedback: "Confused how to create my first project" We should be more supportive in the UI for this special case since it is a first time experience with the UI. Therefore when the workbench is empty we should offer to create a new Java project. Minimal solution is to show an info dialog that explains that user should create a project first and offer a button to open the Java project wizard. The same is true for the new package and new interface buttons.
org.eclipse.jdt.ui/ui/org/eclipse/jdt/internal/ui/actions/AbstractOpenWizardAction.java
*/	
	public AbstractOpenWizardAction(String label, Class[] activatedOnTypes, boolean acceptEmptySelection) {
		super(label);
		fActivatedOnTypes= activatedOnTypes;
		fAcceptEmptySelection= acceptEmptySelection;
	}
	/**
	 * Creates a AbstractOpenWizardAction with no restrictions on types, and does allow
	 * an empty selection.
	 */
	protected AbstractOpenWizardAction() {
		fActivatedOnTypes= null;
		fAcceptEmptySelection= true;
		fNoChecking= true;
	}
	
	protected IWorkbench getWorkbench() {
		return JavaPlugin.getDefault().getWorkbench();
	}
	
	private boolean isOfAcceptedType(Object obj) {
		if (fActivatedOnTypes != null) {
			for (int i= 0; i < fActivatedOnTypes.length; i++) {
				if (fActivatedOnTypes[i].isInstance(obj)) {
					return true;
				}
			}
			return false;
		}
		return true;