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After reading through Jorge's blog post on the guidelines for Liferay contributions, and after following the link to the style guidelines on the Liferay wiki, I put together a configuration file which works with Eclipse's built-in code formatter to adjust the whitespace in your code so that is compatible with the stated Liferay guidelines.

To use this configuration file, go to your Eclipse preferences dialog. Check under Java > Code Style > Formatter (screenshot), and then Import the above linked file. A new profile called "Liferay [user]" will then be made available (screenshot). Finally, click the Apply button to set it for the current workspace.

Once this configuration file is imported and applied to the current workspace, every time you run Source > Format, Eclipse will automatically adjust the whitespace in your code to make it conform to the stated Liferay guidelines. To bulk reformat, you can right-click on any given folder while in the Navigator view (or Ctrl+Click on the folder under OS X), and select Source > Format.

I don't know of any tools which help satisfy all of the Liferay style guidelines not pertaining to whitespace. However, based on its documentation, the commercial version of Jalopy from TRIEMAX software appears to come very close with its sorting capabilities.