This week's book giveaway is in the General Computing forum. We're giving away four copies of Arduino in Action and have Martin Evans, Joshua Noble, and Jordan Hochenbaum on-line! See this thread for details.
Then if you expect a lot of users of your app then you could add a db pool like apache.commons.dbcp or proxool.
Not sure what you mean with db plugins for Eclipse but if you mean a object/relational persistence and query service then look into http://www.hibernate.org/
Hmmmm...why have you installed an old version of Eclipse? Latest version is 3.4 Ganymede.