<Core Libs Dev>[9] Review request for 8039172: Tidy warnings cleanup for java.net, java.math, java.time, java.rmi

[alexander stepanov]

Hello,

Could you please review the fix for the following bug:
https://bugs.openjdk.java.net/browse/JDK-8039172

Webrev corresponding:
http://cr.openjdk.java.net/~yan/8039172/webrev.00/

Just a minor cleanup of javadoc to avoid tidy warnings; no other code 
affected.

Thanks.

Regards,
Alexander