[TYPO3-mvc] Sub folders inside folder Controller

[portal at the-green-modeling.de]

Hi @all,
 
I am trying to create sub folders inside "Classes/Controller", where I can store
controllers for a part of my domain objects.
 
For instance I have an entity which is stored inside the folder
"Classes/Domain/Model/Participants/Participant.php". Now I would like to create
a controller for this entity which is placed under
"Classes/Controller/Participants/ParticipantController.php". As fare as good.
 
Next I did, was the plugin configuration:
 
Tx_Extbase_Utility_Extension::configurePlugin(
  $_EXTKEY,
  'Pi1',
  array(
    'Participants_Participant' => 'list'
  ),
  array()
);
 
After this steps I called the frontend page and get an error: "The controller
name must not contain underscores."
 
The only things I did, was moving the running "ParticipantController" from
"Classes/Controller" to "Classes/Controller/Participants", perform naming
corrections and reconfigure the plugin.
 
It seems that I can create and use sub folders inside my domain and repository
packages but not inside controller.
 
Is it correct? Or what I did wrong?
 
 
Thanks for your help
Nico

 [anhören]  [http://dict.tu-chemnitz.de/pics/s1.png] participant
[http://dict.tu-chemnitz.de/english-german/participant.html]