Perhaps you would like to create your own Abiquo Storage plugin. You can read more here: http://wiki.abiquo.com/display/ABI24/Storage+Plugin+SDK
Depending on the IDE you are using and it's configuration, you will see all code and documentation from the code dependencies, as the archetype for storage plugin is intended to be used as a standard Maven project, so it should be enough to use it with the provided javadoc documentation.
You can download the javadoc file for storage separately, extract files and navigate thought it:
Extract the file within a folder:
jar -xvf ssm-model-2.2.0-javadoc.jar
Then you can open the index.html and navigate the javadoc.