JDK 9 RFR of JDK-8077094: Fix missing doclint warnings in the javax.swing.plaf package

[Joseph D. Darcy]

Hello,

Another turn at missing doclint cleanup, this time for
    JDK-8077094: Fix missing doclint warnings in the javax.swing.plaf 
package
    http://cr.openjdk.java.net/~darcy/8077094.0/

Thanks,

-Joe