| IApplicationDatabase | Currently not in use. |
| IDataProvider | This interface holds reference to all data sources that are accessed by a JEB engines instance. |
| IFileDatabase | Database of binary blobs. |
| IFileDatabaseReader | A database record reader. |
| IFileDatabaseWriter | A database record writer. |
| IFileStore | Definition of a binary file store: a store where artifacts are byte arrays uniquely identified by a key. |
| IUserDatabase | Currently not in use. |