Archetype - liberty-archetype-ear
· An archetype that generates a Java EE 8 multi-module project that includes an EJB module, a web application module and an EAR module
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 liberty-archetype-ear-3.7.1.jar file.
Once you open a JAR file, all the java classes in the JAR file will be displayed.