diff --git a/.settings/edu.umd.cs.findbugs.core.prefs b/.settings/edu.umd.cs.findbugs.core.prefs
index 5ce4d272957809afd699ae2bca04931cfbfc3849..3859298be5bcb28e45aa0ee74a54927731d8e2fd 100644
--- a/.settings/edu.umd.cs.findbugs.core.prefs
+++ b/.settings/edu.umd.cs.findbugs.core.prefs
@@ -1,5 +1,5 @@
 #FindBugs User Preferences
-#Wed Dec 17 09:02:35 CET 2014
+#Fri Dec 19 13:43:52 CET 2014
 detector_threshold=3
 effort=max
 excludefilter0=.fbExcludeFilterFile|true
diff --git a/src/main/java/teetime/framework/idle/SleepStrategy.java b/src/main/java/teetime/framework/idle/SleepStrategy.java
index 3fabdc2e645d084f88708f5a0dfd124a16b5624c..89796a01e29b6f6b3671f4e6bdafbcf09d80d233 100644
--- a/src/main/java/teetime/framework/idle/SleepStrategy.java
+++ b/src/main/java/teetime/framework/idle/SleepStrategy.java
@@ -1,6 +1,6 @@
 package teetime.framework.idle;
 
-public class SleepStrategy implements IdleStrategy {
+public final class SleepStrategy implements IdleStrategy {
 
 	private final long timeoutInMs;
 
diff --git a/src/main/java/teetime/framework/idle/YieldStrategy.java b/src/main/java/teetime/framework/idle/YieldStrategy.java
index 80a508d98936dbaa4cdd4fb6bb2dc4297d70e531..c6b09d959f26f4093e96d0e97e4dd631ddf51219 100644
--- a/src/main/java/teetime/framework/idle/YieldStrategy.java
+++ b/src/main/java/teetime/framework/idle/YieldStrategy.java
@@ -1,6 +1,6 @@
 package teetime.framework.idle;
 
-public class YieldStrategy implements IdleStrategy {
+public final class YieldStrategy implements IdleStrategy {
 
 	@Override
 	public void execute() throws InterruptedException {