JCommander cl = new JCommander(opts);
cl.setProgramName(Admin.class.getName());
StopCommand stopOpts = new StopCommand();
cl.addCommand("stop", stopOpts);
StopMasterCommand stopMasterOpts = new StopMasterCommand();
cl.addCommand("stopMaster", stopMasterOpts);
StopAllCommand stopAllOpts = new StopAllCommand();
cl.addCommand("stopAll", stopAllOpts);
cl.parse(args);
if (opts.help || cl.getParsedCommand() == null) {