https://en.wikipedia.org/wiki/CI/CD
https://maven.apache.org/plugins/maven-javadoc-plugin/javadoc-mojo.html
https://maven.apache.org/plugins/maven-javadoc-plugin/usage.html
https://guides.github.com/features/mastering-markdown/
https://www.reddit.com/r/javahelp/comments/5o4efm/strange_error_while_executing_mvn_test_error/