Hello.

> I see that OpenRTM-aist only has several generated RTC classes such as on_initialize, on_finalize, and so on on its template.
> If I want to add another RTC class such as the class from RTObject interface or another class from another interface, what should I do?

RtcTemplate provides the following interface definitions on the header file.

virtual ReturnCode_t onInitialize ()
virtual ReturnCode_t onFinalize ()
virtual ReturnCode_t onStartup (RTC::UniqueId ec_id)
virtual ReturnCode_t onShutdown (RTC::UniqueId ec_id)
virtual ReturnCode_t onActivated (RTC::UniqueId ec_id)
virtual ReturnCode_t onDeactivated (RTC::UniqueId ec_id)
virtual ReturnCode_t onExecute (RTC::UniqueId ec_id)
virtual ReturnCode_t onAborting (RTC::UniqueId ec_id)
virtual ReturnCode_t onError (RTC::UniqueId ec_id)
virtual ReturnCode_t onReset (RTC::UniqueId ec_id)
virtual ReturnCode_t onStateUpdate (RTC::UniqueId ec_id)
virtual ReturnCode_t onRateChanged (RTC::UniqueId ec_id)

I think these are enough to write your components in most cases.
To use them, uncomment the definition on .h file and implement the function on .cpp file.

> Should I add it manually or is there a way from RtcTemplate to generate it automatically?

If you want to use other interfaces, you have to write them manually.
But, I do not recommend to override virtual interfaces except the above ones
even if they can be overridden, because unexpected troubles might occur.