Add ignore files in .gitignore
diff --git a/.gitignore b/.gitignore
index 1fc88e9..d66a50b 100644
--- a/.gitignore
+++ b/.gitignore
@@ -4,3 +4,5 @@
 /.checkstyle
 /.project
 /.settings
+/pom.xml.*
+/release.properties