The package scanner in the TBot Framework is very simple and have several rules, which can help you understand right usage of handlers, rules and classes.
Firstly, the main class, which you give to the framework will be used to scan all other classes in the same or nested packages. For example, for given class org.examle.package.Main.class the all other classes will be find in org.example.package.*, but not org.example.*. It may be a issue, if you give package inner class instead of required level.
Secondly, the classes which contains handlers or rule handlers, must be have applicable constructor. It means that the package scanner will fall into an exception if the class have constructor with unknown arguments.
Thirdly, the classes which doesn't contains handlers will be skipped.
That's all. Also I have to tell about definition 'handler' in package scanner's sense: "The handlers is a class method (non-static) which is marked by the @Rule annotation."