Well myself If I were to choose between the 2, I would go for Swordsman, just because wookiees get the stat bonuses that would benifit a melee class and not ranged especially Carbineer. If you want to be a decent melee fighter, go with Master Brawler/ Master Swordsman, so you get the warcry 2, which will really help out. Especially since wookiees get a bonus to it anyways.
I personally dont like carbines, so I wouldnt bother with it. Its just up to you, try it and if you dont like it drop it...