Too passive or just right? What do the experts think?

[DONTUSETHIS]

Some hands come up for me and I play them like this. Does anyone think this is wrong.

Early in tourney with fairly deep stacks both hero and villian have over 75BB.

Everyone folds to me and I raise to 3BB with 99. Aggressive button calls.

Lets say that the flop is JJ2. He checks, I check.
Turn 7. He bets 4BB. I call.
River 4. He bets 6BB. I call.

Do you think that this is wrong? The way I see it is that after the flop the villian is either way ahead or way behind. Raising will only do one of two things, stop him from betting a worse hand or build a pot where I am well behind. What do you guys think?