The various JDK projects on OpenJDK, e.g., jdk9, use jcheck to check the content and commit message of each changeset that goes into the repo. See the jcheck page for more information about jcheck, and the OpenJDK Producing a Changeset page for the required format of commit messages.
OpenJFX is not presently enabled to use jcheck on the server, but we are working towards this as a goal. This work is tracked by JBS bug JDK-8145561. The three main benefits of using jcheck are: