[Haskell-beginners] How to create a monad instance

[Marco De Oliveira]

Hi,

Is it possible to create an instance of Monad for IOException?
Each time a try I stay blocked by IO monad.

with the definition:

data IOException a = IOExceptionCons (IO (Exception a))

data Exception a = SuccessCons (Maybe Warning) a
                          | ErrorCons Error

data Warning = WarningCons1
                    | WarningCons2

data Error = ErrorCons1
                | ErrorCons2

Regards