public static Path createTempDirectory(final String prefix) {
        try {
            return Files.createTempDirectory(prefix);
        } catch (final IOException e) {
            throw new UncheckedIOException(e);
        }
    }
Similar to the unix touch command. Sets the last modified time to now if the file
exists else, creates the file

@throws IOException
stroom-util/src/main/java/stroom/util/io/FileUtil.java