Minor Hi!
Wouldn't it be cool to have, or is there something like an universal command:
You'd register it like ... this for example "this.setUniversalCommand(new UniversalCommandClass());"
Could be used if you want an argument on any of your plugins commands to trigger lets say the message "Hello".
Example
> /command specificArg
Hello
> /othercommand specificArg
Hello
This can be done manually.. I know.. but its just nice to have things dynamically isn't it?
Have a good day! 
No I don't mean the onCommand method. For onCommand you have to assign a command to it for it to work. But I'm asking for a method, that, if ANY command is called, executes. With such a thing, if you would want to have partially the same functions on all commands, you wouldn't need to put this function in every command class. A little change but I personally would like it. Thanks