Bug 310408 [CommonNavigator] Scary looking error messages incorrectly appear in log
bundles/org.eclipse.ui.navigator/src/org/eclipse/ui/internal/navigator/wizards/CommonWizardDescriptorManager.java
private static final CommonWizardDescriptorManager INSTANCE = new CommonWizardDescriptorManager();
	private static boolean isInitialized = false;
	private static final String[] NO_DESCRIPTOR_IDS = new String[0];
	private static final CommonWizardDescriptor[] NO_DESCRIPTORS = new CommonWizardDescriptor[0];
	
	/**
	 * Find wizards of type 'new'.
	 */
	public static final String WIZARD_TYPE_NEW = "new"; 
	private Map commonWizardDescriptors = new HashMap();
	/**
	 * @return the singleton instance of the registry
	 */