Bug 315281 update copyrights for 3.6
bundles/org.eclipse.ui.navigator/src/org/eclipse/ui/internal/navigator/extensions/NavigatorContentDescriptorManager.java
firstClassDescriptorsSet.add(desc);
					if (Policy.DEBUG_EXTENSION_SETUP) {
						System.out.println("First class descriptor: " + desc); 
					}
				} else {
					overridingDescriptors.add(desc);
					if (Policy.DEBUG_EXTENSION_SETUP) {
						System.out.println("Overriding descriptor: " + desc); 
					}
				}
				allDescriptors.put(desc.getId(), desc);
				if (desc.hasSaveablesProvider()) {
					saveablesProviderDescriptors.add(desc);
					if (Policy.DEBUG_EXTENSION_SETUP) {
						System.out.println("Saveables provider descriptor: " + desc); 
					}
				}
				if (desc.isSortOnly()) {
					sortOnlyDescriptors.add(desc);
					if (Policy.DEBUG_EXTENSION_SETUP) {
						System.out.println("SortOnly descriptor: " + desc); 
					}
				}
			}
		}
	}
	/**
	 * 
	 */
	private void computeOverrides() {