openbp-builder
· This file is the builder pom of the project. It defines the structure of the project as well as all plugin versions and configurations.
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 openbp-builder-0.9.11.jar file.
Once you open a JAR file, all the java classes in the JAR file will be displayed.