jodd-core/src/main/java/jodd/io/FileUtil.java
public static void appendString(final File dest, final String data, final String encoding) throws IOException {
		outString(dest, data, encoding, true);
	}
public static void appendString(final File dest, final String data, final String encoding) throws IOException {
		outString(dest, data, encoding, true);
	}
Appends String. append = true

@see #outString(File, String, String, boolean)