@SuppressWarnings("unchecked") public boolean addTelegramWriter(TelegramWriter newWriter){
  return (telegramWriters.add(newWriter));
}

@ SuppressWarnings ( "unchecked" ) public boolean addTelegramWriter ( TelegramWriter newWriter ) { return ( telegramWriters . add ( newWriter ) ) ; }
add a new writer to be notified about new telegrams
