jodd-core/src/main/java/jodd/io/FileUtil.java
public static File createTempDirectory(final String prefix, final String suffix, final File tempDir) throws IOException {
		File file = createTempFile(prefix, suffix, tempDir);
		file.delete();
		file.mkdir();
		return file;
	}
public static File createTempDirectory(final String prefix, final String suffix, final File tempDir) throws IOException {
		File file = createTempFile(prefix, suffix, tempDir);
		file.delete();
		file.mkdir();
		return file;
	}
Creates temporary directory.

@see #createTempFile(String, String, File)