In order to make efficient distribution of your interface, you should consider licensing EnergyPlus. First, you must license/register to use EnergyPlus. Since we are distributing EnergyPlus via the World Wide Web, at no charge, it will be easy to get your hands on a copy for testing out your interface. However, you may wish to understand more of the internals and, to make a complete distribution package, will need to at least execute a distribution license.
https://energyplus.net/licensing contains the details on licensing EnergyPlus for commercial or non-commercial use.