Add jOOQ generated java file detection

[simoleone]

Add jOOQ generated java file detection.

Description

j00Q is a relatively popular (3.7K stars) SQL library for Java, and works by generating .java source files. Many people check in these generated files, as this github search with 38K source file hits shows.

The jooq code generator emits a comment at the top of .java files which it generates. This detection technique is used by many of the other generated code detectors as well.

Checklist:

• I have included a real-world usage sample for all extensions added in this PR:

  • Sample source(s):
    • https://github.com/jOOQ/jOOQ/blob/990bfa4663d832695a7baef205e2b532a1d93133/jOOQ-examples/jOOQ-kotlin-example/src/main/java/org/jooq/example/db/h2/tables/BookStore.java
  • Sample license(s): Apache

• I am adding new or changing current functionality

  • I have added or updated the tests for the new or changed functionality.

[pchaigno]

Thanks for the pull request!