Removed "DoubleCheckedLocking", because it is not valid anymore.
diff --git a/conf/checkstyle/sun_checks.xml b/conf/checkstyle/sun_checks.xml
index 79bef41..51a7f8c 100644
--- a/conf/checkstyle/sun_checks.xml
+++ b/conf/checkstyle/sun_checks.xml
@@ -145,7 +145,6 @@
<!-- Checks for common coding problems -->
<!-- See http://checkstyle.sf.net/config_coding.html -->
<module name="AvoidInlineConditionals"/>
- <module name="DoubleCheckedLocking"/> <!-- MY FAVOURITE -->
<module name="EmptyStatement"/>
<module name="EqualsHashCode"/>
<module name="HiddenField"/>