Bukkit Command Event Handlers

Ok so im creating a plugin where I use different commands in another class and they do stuff. Now the problem i'm having is kinda 2 things.

1.) I have tried to register the command on enable with this:
this.getCommand("suspend").setExecutor(new commands());
and then use:
public boolean onCommand1(CommandSender sender, Command cmd, String commandLabel, String [] args){
As well as making the commands class implement CommandExecutor

This works perfectly if i only have one command. When i try to add another, the method name is already taken so i change this, however now it wont register this command.

2.) I have also tried to register the command as an event with this on enable:
this.getServer().getPluginManager().registerEvents(new commands(), this);
and then using this event handler:
@EventHandler
public boolean onCommand(CommandSender sender, Command command, String commandLabel, String[] args) {
This does not work at all and doesn't even fire the event.

So i guess my question is how do you make an event handler for multiple commands, or is there another way it should be done.

Any help would be great, thank!