jodd-core/src/main/java/jodd/io/FileUtil.java
public static void appendBytes(final File dest, final byte[] data, final int off, final int len) throws IOException {
		outBytes(dest, data, off, len, true);
	}
public static void appendBytes(final File dest, final byte[] data, final int off, final int len) throws IOException {
		outBytes(dest, data, off, len, true);
	}
public static void appendBytes ( final File dest , final byte [ ] data , final int off , final int len ) throws IOException { outBytes ( dest , data , off , len , true ) ; }
Appends bytes. append = true

@see #outBytes(File, byte[], int, int, boolean)
Appends bytes . append = true