* metadata-mapping

* Update README.md

* add class diagram

* update README.md

* fix identation

* Update pom.xml

* fix indentation

* fix ci

* remove e.printstack

* fix ci

* update class diagram

* fix ci

* fix ci

* fix sc

* fix smells

* Update DatabaseUtil.java

* fix coverage

* Update DatabaseUtil.java

* Update DatabaseUtil.java

* Update DatabaseUtil.java

* Update metadata-mapping/README.md
Co-authored-by: NIlkka Seppälä <iluwatar@users.noreply.github.com>

* fix review

* fix review

* Update App.java

* Update App.java

* fix review
Co-authored-by: NIlkka Seppälä <iluwatar@users.noreply.github.com>