/**
* Constructor. Parameters are:
- * - writeFactory : ObjectFactory::getObjectFromSpec parameters yeilding BagOStuff.
+ * - writeFactory : ObjectFactory::getObjectFromSpec array yeilding BagOStuff.
* This object will be used for writes (e.g. the master DB).
- * - readFactory : ObjectFactory::getObjectFromSpec parameters yeilding BagOStuff.
+ * - readFactory : ObjectFactory::getObjectFromSpec array yeilding BagOStuff.
* This object will be used for reads (e.g. a slave DB).
*
* @param array $params