Bug 315281 update copyrights for 3.6
bundles/org.eclipse.ui.navigator/src/org/eclipse/ui/internal/navigator/sorters/CommonSorterDescriptorManager.java
* 
		 * @see org.eclipse.ui.internal.navigator.extensions.NavigatorContentRegistryReader#readElement(org.eclipse.core.runtime.IConfigurationElement)
		 */
		protected boolean readElement(IConfigurationElement element) {
			if (TAG_NAVIGATOR_CONTENT.equals(element.getName())) {
				String id = element.getAttribute(ATT_ID);
				if (id != null) {
					NavigatorContentDescriptor contentDescriptor = CONTENT_DESCRIPTOR_MANAGER
							.getContentDescriptor(id);
					if (contentDescriptor != null) {
						IConfigurationElement[] children = element
								.getChildren(TAG_COMMON_SORTER);
						if (children.length > 0) {
							Set localSorters = getCommonSorters(contentDescriptor);
							for (int i = 0; i < children.length; i++) {
								localSorters.add(new CommonSorterDescriptor(
										children[i]));
							}
							return true;
						}
					} else {
						NavigatorPlugin
								.logError(
										0,
										NLS
												.bind(
														CommonNavigatorMessages.CommonSorterDescriptorManager_A_navigatorContent_extension_does_n_,
														new Object[] {
																id,
																element