addOptionHandler(new OptionHandlerHelp());
addOptionHandler(new OptionHandlerVersion());
// validators
addValidator(new OptionValidatorForViewers(optionHandlerViewer));
addValidator(new OptionValidatorForConnector(optionHandlerClientConnection));
addValidator(new OptionValidatorForPersistor(optionHandlerPersistor));
return optionHandlerViewer;
}