Here is a checklist that will help in making a contribution easy for both the contributor and the core developers that have to review the contribution.

• Checkout Katta trunk code:
  • git clone https://github.com/sgroschupf/katta.git
• Send a message to the Katta mailing list, or file a bug report in Jira to describe your proposed changes and check that they fit in with what others are doing
• Make the code change
• Add APL 2 License headers, note all your work will be contributed as Apache License 2.
• All public classes and methods should have informative Javadoc comments
• Do not use @author tags
• Code should be formatted according to Katta’s formatting standard (refer to the file katta_formatting.xml which is used with Eclipse and located under the project’s root directory).
• Contributions should pass existing unit tests
• New unit tests should be provided to demonstrate bugs, fixes and new functionality
• You need to decide whether any new code should be submitted to the main sources or whether it should go under extras - Katta’s contribution folder
• Run the build including the tests and ensure that you can build a distribution.
• Create a patch
  • Make sure you code is added to git e.g.git add src/.../NewClass.java
  • Create a patch file git format-patch master --stdout >~/Desktop/KATTA-78-v2.patch
• Inspect your patch file and check that :
  • You did not reformat code
  • Unused code is removed
  • You have commented code whose function or rationale is not obvious
  • Updated documentation
• Test your patch file patch:
  • (overview it)git apply --stat fix_empty_poster.patch
  • (dry run it it)git apply --check fix_empty_poster.patch
  • (apply it)git apply --signoff fix_empty_poster.patch
• Attach your patch file to a Jira issue
• *Alternatively* fork Katta and send and pull request!