Creating a static temporary directory as suitable for use in a JUnit @DataPoints method. Based upon the advice at: http://stackoverflow.com/a/17846991/808804

gistfile1.java

    private static File tmpDir;
    
    @BeforeClass
    public static void setUp() {
        String dirname = UUID.randomUUID().toString().replace("-", "");
        tmpDir = new File(System.getProperty("java.io.tmpdir"), dirname);
        if (!tmpDir.exists()) {
            tmpDir.mkdir();
        }
    }
    
    @AfterClass
    public static void tearDown() {
        if(tmpDir.exists()) {
            try {
                FileUtils.deleteDirectory(tmpDir);
            } catch (IOException e) {
                System.err.println("Error deleting temporary directory: " 
                        + tmpDir + " -- " + e);
            }
        }
    }