#21 DiskWriterPlugin FileNotFoundException with dot reference

[Phil Shaw]

On Windows systems, the dot reference in the plugin
constructor does not resolve to a meaningful directory
reference.

The ensureFolder and ensureFolders methods don't
complain at the problem and when the plugin attempts to
write files, it gives a FileNotFoundException with paths
like these:

c:\jspider\output\.\test.example.org\index.html