This project contains Java objects for building Cloudformation template components.
These objects can then be serialised to a JSON or YAML template using the Jackson library.
Download JD-GUI to open JAR file and explore Java source code file (.class .java)
Click menu "File → Open File..." or just drag-and-drop the JAR file in the JD-GUI window smt-cloudformation-parent-15.2.0.1.jar file.
Once you open a JAR file, all the java classes in the JAR file will be displayed.