import org.apache.commons.vfs2.provider.ram.RamFileProvider;
import org.apache.commons.vfs2.provider.sftp.SftpFileProvider;
import org.apache.commons.vfs2.provider.url.UrlFileProvider;
-import org.argeo.maintenance.MaintenanceException;
/**
* Programatically configured VFS file system manager which can be declared as a