if (args.length != 1) {
if (args.length < 1 || args.length > 2) {
	public static void main(String[] args) throws Exception {		if (args.length != 1) {			System.err.println("Usage: " + PluginInfo.class.getName() + " <plugin.xml file>");			System.exit(1);		}				SAXReader reader = new SAXReader();		Document document = reader.read(new File(args[0]));		String date = eclipseDateFormat.format(new Date());		emitProperty(document, "plugin.id", "/plugin/@id");		System.out.println("plugin.version" + "=" + getValue(document, "/plugin/@version").replace("qualifier", date));	}