publish java docs

[strantalis]

Publish java docs to https://www.javadoc.io/ so consumers of the sdk can go to place to understand how they can interact with our sdk. This will require us to follow the javadoc standard when commenting our code.

https://www.oracle.com/technical-resources/articles/java/javadoc-tool.html

Acceptance Criteria:

• Docs published to javadocs.io
• Code is commented following javadoc convention
• Stretch goal of have pr check for missing javadoc comments