Further UserDefinedFileAttributeView improvements and fixes

[Alan Bateman]

On 02/03/2021 15:13, Sebastian Stenzel wrote:
> - fix leaking NativeBuffer by applying try-with-resource where applicable
> - fix UnsupportedOperationException if trying to read to a Buffer that doesn't provide a backing array
>
I can create bugs but I think it would be useful to know if this the 
above are real issues or not. All usages of NativeBuffer should already 
be using try-finally blocks (try-with-resources will improve this of 
course), have you found cases here this isn't the case? The read method 
handle both direct and heap buffers, which cases are you running into 
where the backing memory is something else?

-Alan.