diff --git a/sonar-project.properties b/sonar-project.properties
index c92c2756..a862f9b5 100644
--- a/sonar-project.properties
+++ b/sonar-project.properties
@@ -11,3 +11,6 @@ sonar.projectVersion=4.0.0_r3
 
 # Encoding of the source code. Default is default system encoding
 #sonar.sourceEncoding=UTF-8
+
+#Exclude backup java files from sonar
+sonar.exclusions=**/*.java