FPSAnimator: Add note on deamon-thread and JVM shutdown behavior.

src/jogl/classes/com/jogamp/opengl/util/Animator.java

@@ -56,8 +56,7 @@
  * so it is able to keep an application from terminating.<br>
  * Call {@link #stop() } to terminate the animation and it's execution thread.
  * </p>
-*/
-
+ */
 public class Animator extends AnimatorBase {
     /** timeout in milliseconds, 15 frames @ 60Hz = 240ms, limiting {@link #finishLifecycleAction(Condition)} */
     private static final long TO_WAIT_FOR_FINISH_LIFECYCLE_ACTION = 15*16;

src/jogl/classes/com/jogamp/opengl/util/FPSAnimator.java

@@ -42,9 +42,16 @@
 import java.util.*;
 import javax.media.opengl.*;
 
-/** An Animator subclass which attempts to achieve a target
-frames-per-second rate to avoid using all CPU time. The target FPS
-is only an estimate and is not guaranteed. */
+/** 
+ * An Animator subclass which attempts to achieve a target
+ * frames-per-second rate to avoid using all CPU time. The target FPS
+ * is only an estimate and is not guaranteed. 
+ * <p>
+ * The Animator execution thread does not run as a daemon thread,
+ * so it is able to keep an application from terminating.<br>
+ * Call {@link #stop() } to terminate the animation and it's execution thread.
+ * </p>
+ */
 public class FPSAnimator extends AnimatorBase {
     private Timer timer = null;
     private TimerTask task = null;