Trackpoint trackpoint1 = new Trackpoint(trackpointId++);
Trackpoint trackpoint2 = new Trackpoint(trackpointId++);
Trackpoint trackpoint3 = new Trackpoint(trackpointId++);
Trackpoint trackpoint4 = new Trackpoint(trackpointId++);
competition.addTrackpoint(trackpoint1);
competition.addTrackpoint(trackpoint2);
competition.addTrackpoint(trackpoint3);
competition.addTrackpoint(trackpoint4);
PersistenceManager pm = pmf.getPersistenceManager();