JJ in SB capped .... with a maniac

[PokerHund]

Good online 20-40. Bad player (callingstation) limps. folded to a maniac in late P and he raises. ( he is crazy and will always raise preflop and make a lot of moves HU but plays decent postflop with multiwayaction) Button (good player who loves to isolate the fish) 3 bet. I'm big blind with JJ. I cap. evrybody calls.

Flop: KQ7 rainbow. I check and everybody checks behind.
Turn: another 7 ; i bet EP folds other 2 call.
River is my J : i bet , only button calls and my hand is good. Button has 99. How was my flop and turn play ?