diff --git a/.gitignore b/.gitignore
index f109046539e9dc4789e88afad59610c17de9f50d..25d2273ee3890643045c668d1e343243b02ffe81 100644
--- a/.gitignore
+++ b/.gitignore
@@ -1,5 +1,13 @@
+# OS X
 *.DS_Store
+
+# Java
 *.jar
-*.JAR
 *.war
-*.WAR
+*.ear
+
+# Mobile Tools for Java (J2ME)
+.mtj.tmp/
+
+# virtual machine crash logs, see http://www.java.com/en/download/help/error_hotspot.xml
+hs_err_pid*