hg: jdk/client: 8153532: Add @throws NPE javadoc to UIManager.setLookAndFeel(String) method description

[prahalad.kumar.narayanan at oracle.com]

Changeset: 6cd19862c742
Author:    pbansal
Date:      2018-04-16 15:22 +0530
URL:       http://hg.openjdk.java.net/jdk/client/rev/6cd19862c742

8153532: Add @throws NPE javadoc to UIManager.setLookAndFeel(String) method description
Reviewed-by: prr, serb, kaddepalli

! src/java.desktop/share/classes/javax/swing/UIManager.java
+ test/jdk/javax/swing/UIManager/UIManagerSetLookAndFeelNPETest.java