}
super.tearDown();
}
private FileSystem createFileSystem() {
FileSystem fs = new MemoryFileSystem();
BufferedWriter writer = null;
try {
fs.createFolder("/");
FileSystemResource file = new FileSystemResource(fs, "/retention");
writer = new BufferedWriter(new OutputStreamWriter(file.getOutputStream()));
writer.write(((NodeImpl) childN).getNodeId().toString());
} catch (FileSystemException e) {