JJ oop vs unknown

[leehrat]

i have no stats or reads on my opponent thus far. i figured i had to call the river bet since it was quite small, even though a flush just got there. does this look decent?

Party Poker No-Limit Hold'em, $ BB (6 handed) internettexasholdem.com

UTG ($41.08)
Hero ($49.50)
CO ($30.95)
Button ($91)
SB ($54.30)
BB ($52.30)

Preflop: Hero is MP with J[img]/images/graemlins/spade.gif[/img], J[img]/images/graemlins/heart.gif[/img]. SB posts a blind of $0.25.
<font color="#666666">1 fold</font>, <font color="#CC3333">Hero raises to $2</font>, <font color="#666666">1 fold</font>, Button calls $2, <font color="#666666">2 folds</font>.

Flop: ($4.75) 9[img]/images/graemlins/diamond.gif[/img], T[img]/images/graemlins/club.gif[/img], 2[img]/images/graemlins/diamond.gif[/img] <font color="#0000FF">(2 players)</font>
<font color="#CC3333">Hero bets $4.55</font>, Button calls $4.55.

Turn: ($13.85) 9[img]/images/graemlins/spade.gif[/img] <font color="#0000FF">(2 players)</font>
<font color="#CC3333">Hero bets $8</font>, Button calls $8.

River: ($29.85) Q[img]/images/graemlins/diamond.gif[/img] <font color="#0000FF">(2 players)</font>
Hero checks, <font color="#CC3333">Button bets $8</font>, Hero calls $8.

Final Pot: $45.85