Facade Design Pattern

Provide a unified interface to a set of interfaces in a subsystem. Facade defines a higher-level interface that makes the subsystem easier to use.

Advantages

Minimizes complexity of sub-systems
Aids principle of loose coupling
Software becomes more flexible and easily expandable

Disadvantages

Complex implementation (especially with existing code)
Approach is coupled to an additional level of indirection
High degree of dependence at facade interface