I just had a look, and I think all he has done is file an Intention to Appeal, which should be done early.
The Intention to Appeal
form is not yet looking for a specific reason(s) for the appeal.
I imagine they can probably withdraw the intention, if they can't come up with a reason that will warrant an appeal.
Lodging a Notice of Intention to Appeal (NIA)
You must lodge your NIA within 28 days of being sentenced.
If you want to appeal your conviction, you do not have to wait until you are sentenced. You should lodge the NIA for a conviction appeal straight away and, if you want to appeal the sentence later as well, you can do this too by lodging another NIA for a sentence appeal.
The effect of lodging your NIA is that you tell the court you are thinking about appealing and then the court gives you 12 more months to actually lodge an appeal.
A guide to indictable appeals - Legal Aid NSW