8016370: javadoc warnings, unexpected </p> mostly

[Alan Bateman]

I was playing with javadoc -Xlint recently and one set of issues that it 
reports is unexpected </p> at the end of the initial paragraph on many 
of the NIO methods. I thought this was a false-positive but Jon Gibbons 
has convinced me otherwise.

So I'd like to fix the 200 or so warnings with the following patch:

http://cr.openjdk.java.net/~alanb/8016370/webrev/

The 200 aren't obvious in the webrev because there is generated code in 
the build (hence the update to the templates and the script that 
generates the exception classes).

The simplest way to review this is to look at the patch file.

Thanks,

Alan.