Java 11 support: Modules

[iluwatar]

This task is part of the Java 11 transition plan https://github.com/iluwatar/java-design-patterns/wiki/16.-Java-11-Transition

Java 9 introduces the Java Platform Module System. How should it be utilized in this project? In this task we create a plan what kind of modules are going to be created. Would it be possible to start without modules i.e. let everything belong to the default 'unnamed' module? And then later on possibly create module per pattern.

Links:
https://blog.codefx.org/java/java-9-migration-guide/
https://www.baeldung.com/java-9-modularity

[iluwatar]

Currently all the patterns belong to the unnamed module since they have not been modularized. The next step would be to add module-info.java to each of the patterns to make them real modules.