public static void setLastModified(final Path file, final long time) throws IOException {
        Files.setLastModifiedTime(file, FileTime.fromMillis(time));
    }
Similar to the unix touch cammand. Sets the last modified time to now if the file
exists else, creates the file

@throws IOException
stroom-legacy/stroom-legacy-model_6_1/src/main/java/stroom/legacy/model_6_1/FileUtil.java