When developing systems, some open source libraries are often used, if log4j, JFreeChart, etc. If it is a system that develops RCP, then the best way is to install these libraries as PLUG-IN. But these libraries are not ready-made PLUG-IN methods.
Among the CKNG blog, a way to pack this third-party library into a Plug-in method. Simply put: Create a Plug-IN project, pour it into the JAR file in the third party library, and add it to the running library, and finally export this project into a plug-in's JAR file. For detailed steps, refer to CKNG Blog, Packaging Library AS Plug-in.