Considering all the ticky-tack penalties that have been called this season, that should have been interference. Bergy was taken down as the puck was coming back to him after bouncing off the end boards.
I don't care if the refs call everything or absolutely nothing. Like a home plate umpire, just be consistent.
This is all most NHL fans want. I say most, because some don't want them to call anything against their own team.