Providence IntelliJ IDEA Plugin
I have created a plugin for IntelliJ IDEA that handles the syntax and some some error checking for reserved words, duplicated fields, etc.
Latest release can be downloaded here.
Source Code
The IntelliJ plugin is placed in its own repository as it itself uses the internal IntelliJ (IDEA) build system (not maven as here), and may require specific versions of IDEA in order to build.