Javadoc updates.

core/src/main/java/hudson/triggers/SafeTimerTask.java

@@ -23,27 +23,24 @@
  */
 package hudson.triggers;
 
+import hudson.model.AperiodicWork;
+import hudson.model.PeriodicWork;
+import hudson.security.ACL;
+import java.util.TimerTask;
+import java.util.logging.Level;
+import java.util.logging.Logger;
+import jenkins.util.Timer;
 import org.acegisecurity.context.SecurityContext;
 import org.acegisecurity.context.SecurityContextHolder;
 
-import java.util.Timer;
-import java.util.TimerTask;
-import java.util.logging.Logger;
-import java.util.logging.Level;
-
-import hudson.security.ACL;
-
 /**
- * {@link Timer} wrapper so that a fatal error in {@link TimerTask}
- * won't terminate the timer.
+ * Wrapper so that a fatal error in {@link TimerTask} will not terminate the timer.
  *
  * <p>
- * {@link Trigger#timer} is a shared timer instance that can be used inside Hudson to
- * schedule a recurring work.
- *
+ * {@link Timer#get} is a shared timer instance that can be used inside Jenkins to schedule recurring work.
+ * But the usual usage is automatic via {@link PeriodicWork} or {@link AperiodicWork}.
  * @author Kohsuke Kawaguchi
  * @since 1.124
- * @see Trigger#timer
  */
 public abstract class SafeTimerTask extends TimerTask {
     public final void run() {