JUnitThread t1 = new TestSyncThread(syncManager);
JUnitThread t2 = new TestSyncThread(syncManager);
JUnitThread t3 = new TestSyncThread(syncManager);
t1.start();
t2.start();
t3.start();
/* Wait for all threads to request a sync, so they form a group.*/
Thread.sleep(500);
/* Free thread 1. */