Bug 55884 Loading a user library from file does not warn when overwriting an existing library [build path]
Works in I2004032400010 + plug-in export for I200403240800 Add library 'mylib'. Save it. Change it. Load library from file. ==> should warn that 'mylib' gets changed.
org.eclipse.jdt.ui/ui/org/eclipse/jdt/internal/ui/preferences/UserLibraryPreferencePage.java
}
				if (fExportImportList.getCheckedSize() == 0) {
					return new StatusInfo(IStatus.ERROR, PreferencesMessages.getString("UserLibraryPreferencePage.LoadSaveDialog.list.error.save.nothingselected")); 
				}
				fLastFile= file;
			} else {
				if (name.length() == 0) {
					return new StatusInfo(IStatus.ERROR, PreferencesMessages.getString("UserLibraryPreferencePage.LoadSaveDialog.location.error.load.enterlocation")); 
				}
				if (!new File(name).isFile()) {
					return new StatusInfo(IStatus.ERROR, PreferencesMessages.getString("UserLibraryPreferencePage.LoadSaveDialog.location.error.load.invalid")); 
				}
				if (fExportImportList.getSize() > 0 && fExportImportList.getCheckedSize() == 0) {
					return new StatusInfo(IStatus.ERROR, PreferencesMessages.getString("UserLibraryPreferencePage.LoadSaveDialog.list.error.load.nothingselected")); 
				}
			}
			return new StatusInfo();
		}
		
		protected static void saveLibraries(List libraries, File file, IProgressMonitor monitor) throws IOException {
			FileOutputStream outputStream= new FileOutputStream(file);
			try {
				DocumentBuilder docBuilder= null;
				DocumentBuilderFactory factory= DocumentBuilderFactory.newInstance();
				factory.setValidating(false);
				docBuilder= factory.newDocumentBuilder();
				Document document= docBuilder.newDocument();
	
				
				Element rootElement= document.createElement(TAG_ROOT);