update .gitignore

.gitignore

@@ -1,19 +1,40 @@
-*
-
-!build.gradle
-!gradlew
-!gradlew.bat
-!README.md
-!src
-!src/*
-!src/*/*
-!src/*/*/*
-!src/*/*/*/*
-!src/*/*/*/*/*
-!src/*/*/*/*/*/*
-!src/*/*/*/*/*/*/*
-!src/*/*/*/*/*/*/*/*
-!gradle
-!gradle/wrapper
-!gradle/wrapper/*
-!.travis.yml
+
+### Java template
+# Compiled class file
+*.class
+
+# Log file
+*.log
+
+# BlueJ files
+*.ctxt
+
+# Mobile Tools for Java (J2ME)
+.mtj.tmp/
+
+# Package Files #
+*.jar
+*.war
+*.ear
+*.zip
+*.tar.gz
+*.rar
+
+# virtual machine crash logs, see http://www.java.com/en/download/help/error_hotspot.xml
+hs_err_pid*
+### Gradle template
+.gradle
+/build/
+
+# Ignore Gradle GUI config
+gradle-app.setting
+
+# Avoid ignoring Gradle wrapper jar file (.jar files are usually ignored)
+!gradle-wrapper.jar
+
+# Cache of project
+.gradletasknamecache
+
+# # Work around https://youtrack.jetbrains.com/issue/IDEA-116898
+# gradle/wrapper/gradle-wrapper.properties
+