The project requires that all JavaDoc for public methods exist and are valid (e.g., have all @param, @return and @throws to match the signature). However, the generated Java source for Protobuf contain numerous JavaDoc errors relative to these settings. This causes lots of errors inside Eclipse (and probably other IDEs), but ignoring/disabling the JavaDoc errors leads to improper JavaDoc (fixed in next commit). By moving the generated Protobuf source code to a separate directory (e.g., `generated-sources`), the IDEs will automatically discover the directory and the user can ignore any compiler and JavaDoc errors/warnings for those files while keeping the more strict JavaDoc checking enabled for the rest of the code.
This initial commit defines several modules for ingesting from JDBC and specifically from PostgreSQL and MySQL. The two latter modules define separate unit tests and integration tests, and prior to running the integration tests create a Docker image with the respective database and start a Docker container. Any *.sql or *.sh files are run on database, allowing the modules to easily create and populate databases used in the tests. The integration tests are then run (using the failsafe maven plugin), and regardless of whether there are any failures the Docker container is always shutdown (at least when running `mvn install`). See the modules' README files for details.
