title: 		The Manager design pattern
authors:	Peter Sommerlad and Frank Buschmann
contact:	Peter Sommerlad
address:	Siemens AG, Dept. ZFE T SE 2
		D-81730 Munich
phone:		+49-89-636-48148, FAX: +49-89-636-40898
email:		peter.sommerlad@zfe.siemens.de


abstract:
The Manager pattern extracts a useful design principle
from our code practice that is also present as a part of
the solution of other well-known patterns. The problem
we face often is that we need to control the life-cycle
of or the access to objects of a class. Implementing this
functionality within constructors or as class members
may be ruled out for several reasons. Introducing a separate
manager component for these tasks of object management
improves code reuse and allows for easy change of
management behavior without running into the fragile-base-class
problem.