RFR: 8230648: Replace @exception tag with @throws in java.base

[Julia Boes]

Hi,

This change replaces all occurrences of the @exception tag in java.base 
with the @throws tag. The tags are synonyms but @throws is the newer 
preferred option [1].

Bug: https://bugs.openjdk.java.net/browse/JDK-8230648

Webrev: 
http://corelibs-linux-1.ie.oracle.com/~jboes/webrevs/8230648/webrev.00/


Regards,

Julia

[1] 
https://docs.oracle.com/javase/7/docs/technotes/tools/windows/javadoc.html#throws