improve git ignore file

.gitignore

@@ -1,5 +1,6 @@
 
 # Created by https://www.gitignore.io/api/java
+
 ### Java ###
 # Compiled class file
 *.class
@@ -23,9 +24,28 @@
 
 # virtual machine crash logs, see http://www.java.com/en/download/help/error_hotspot.xml
 hs_err_pid*
+
 # End of https://www.gitignore.io/api/java
+# Created by https://www.gitignore.io/api/maven
+
+### Maven ###
+target/
+pom.xml.tag
+pom.xml.releaseBackup
+pom.xml.versionsBackup
+pom.xml.next
+release.properties
+dependency-reduced-pom.xml
+buildNumber.properties
+.mvn/timing.properties
+
+# Avoid ignoring Maven wrapper jar file (.jar files are usually ignored)
+!/.mvn/wrapper/maven-wrapper.jar
+
+# End of https://www.gitignore.io/api/maven
 
 # Created by https://www.gitignore.io/api/intellij
+
 ### Intellij ###
 # Covers JetBrains IDEs: IntelliJ, RubyMine, PhpStorm, AppCode, PyCharm, CLion, Android Studio and Webstorm
 # Reference: https://intellij-support.jetbrains.com/hc/en-us/articles/206544839
@@ -34,6 +54,14 @@ hs_err_pid*
 .idea/**/workspace.xml
 .idea/**/tasks.xml
 .idea/dictionaries
+.idea/**/compiler.xml
+.idea/**/deployment.xml
+.idea/**/kotlinc.xml
+.idea/**/misc.xml
+.idea/**/modules.xml
+.idea/**/vcs.xml
+.idea/**/*.iml
+/*.iml
 
 # Sensitive or high-churn files:
 .idea/**/dataSources/
@@ -87,4 +115,5 @@ fabric.properties
 
 # Sonarlint plugin
 .idea/sonarlint
+
 # End of https://www.gitignore.io/api/intellij