I thought that Addictive Drums had some patterns that were labelled as song endings? Maybe they are in some of the add packs that I have bought.
I'm not a drummer either, so I understand what you are saying. Your going to need to start thinking like a drummer though to program the drums. I watch drummers pretty intensely these days to see how they handle some of the fills, breaks and endings. I am sure that I freak out the Church drummers all the time watching what they are doing.
What I often will do is have in mind how I would like to end the song and then search for a Fill that is close or generally has that feel. Then go into Piano View and start moving the hits around by hand to change the timing or the kit pieces you want to hit. You will probably want to add your own cymbal hits in at the end if you want the song to end on a cymbal or ride. After a while you find that you have personal preferences for styles...like I like to hit the Ride's and Toms a lot.
Not being a drummer, one thing that I will do when I have them programmed to where I think I like them, is to make sure that they look like a progression that a real drummer would follow. I flip over to the view of the drums actually being played and watch the patterns hitting the drums to make sure it follows the natural progression that a drummer would flow through. For instance, a drummer wouldn't hit something on the far right side of the kit and then with the same stick in the next beat, the far left. He would work his way over from side to side.