Improve .gitignore

.gitignore

@@ -1,10 +1,47 @@
+# Compiled class file
+*.class
 
-# IntelliJ project files
-.idea/
-.gradle/
-build/
-*.iml
+# Log file
+*.log
+
+# BlueJ files
+*.ctxt
+
+# Mobile Tools for Java (J2ME)
+.mtj.tmp/
+
+# Package Files #
+*.jar
+*.war
+*.nar
+*.ear
+*.zip
+*.tar.gz
+*.rar
+
+# virtual machine crash logs, see http://www.java.com/en/download/help/error_hotspot.xml
+hs_err_pid*
+
+# eclipse
+bin
+*.launch
+.settings
+.metadata
+.classpath
+.project
+
+# idea
 out
 gen
+*.ipr
+*.iws
+*.iml
+.idea
 
+# gradle
+build
+.gradle
 
+# other
+eclipse
+run