simple facebook app in java jdk1.6 and restfb, tomcat 7

Project Description:
We need a simple facebook app in java jdk1.6 and restfb, tomcat 7 and mysql, according to the following specification:

URL auth facebook:
https://graph.facebook.com/oauth/authorize?client_id=+ appid + "& redirect_uri =" + redirectURL + "& scope =" + "publish_stream,email,etc";

redirectURL = xxxx.com?userAPP=[user]

Where userAPP, internal user is not a facebook application.

The idea is to associate a user of one internal application with a user facebook, to send private messages.

1. - (RedirectURL) A Servlet callback_Url reception of the authorization of a friend.
2. - Register to friend (userAPP, username, userid, etc) in a mysql table
3. - A servlet that can send private message to a friend, you receive as parameter, the UserID or username and message