Zend\Db\Adapter\DiPdoMysql- An extended version of the PDO MySQL adapter for Zend\Db which allows for injecting an existing PDO instance in a DI-friendly way.EdpCommon\Mapper\DbMapperAbstract- An abstract mapper for Zend\Db that allows for different read and write DB connections (master/slave).EdpCommon\Model\ModelAbstract- An abstract model class with factory methods for instantiating from an associative array (database result).