DAL (Data Access Layer) should be created for the "Forum" database.
Should contain classes & structures to use stored procedures. Logic for control data correctness ("null" values and so on) should NOT be added to DAL. These functions will be implemented in the wrappers level.
Implemented User, Topic, Section and Category managers.
Implemented AccessMask manager. Created structures for represent AccessMask and User tables information. Implemented methods to convert DataRow instance to AccessMask/User information structures.