Why do we use a DataSource instead of a DriverManager?

Why do we use a DataSource instead of a DriverManager?

References

Reference NO 1

http://stackoverflow.com/questions/15198319/why-do-we-use-a-datasource-instead-of-a-drivermanager

Reference NO 2

http://www.coderanch.com/t/296325/JDBC/databases/DriverManager-DataSource

Reference NO 3

http://zetcode.com/tutorials/jeetutorials/datasource/

Reference NO 4

https://blogs.oracle.com/javajungle/entry/performance_test_drivermanager_vs_datasource

Reference NO 5

http://www.java-samples.com/showtutorial.php?tutorialid=632

Reference NO 6

http://publib.boulder.ibm.com/infocenter/db2luw/v8/topic/com.ibm.db2.udb.doc/ad/tjvjcccn.htm

Reference NO 7

http://www.javapractices.com/topic/TopicAction.do?Id=127

Reference NO 8

http://static.springsource.org/spring/docs/2.5.x/api/org/springframework/jdbc/datasource/DriverManagerDataSource.html