Throwing own exception in method causes "InvocationTargetRuntimeException"

When I throw an exception in a method that gets invoked by `CliFactory.parseArgumentsUsingInstance()` I get a `InvocationTargetRuntimeException` in the first place rather than my own exception.

I don't know if there are reasons against it, but I would expect to receive my own exception. That way I could do some argument validation in the methods and throw exceptions respectively.
