RFR: 8252831: Correct "no comment" warnings in jdk.net module

[Patrick Concannon]

Hi,

Could someone please review my changeset that fixes the "no comment" warnings generated by `javadoc -Xdoclint` for `java.base/jdk.net`?

Kind regards,
Patrick

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Commit messages:
 - 8252831: Correct "no comment" warnings in jdk.net module

Changes: https://git.openjdk.java.net/jdk/pull/2792/files
 Webrev: https://webrevs.openjdk.java.net/?repo=jdk&pr=2792&range=00
  Issue: https://bugs.openjdk.java.net/browse/JDK-8252831
  Stats: 10 lines in 1 file changed: 8 ins; 0 del; 2 mod
  Patch: https://git.openjdk.java.net/jdk/pull/2792.diff
  Fetch: git fetch https://git.openjdk.java.net/jdk pull/2792/head:pull/2792

PR: https://git.openjdk.java.net/jdk/pull/2792