Example
protected void finalize() throws Throwable {
try {
OutputStream stream = getOutputStream();
stream.flush();
stream.close();
}
catch (IOException exc) {
LogUtility.log(exc);
}
finally {
super .finalize();
}
}

private OutputStream getOutputStream() {
return _stream;
}

private transient OutputStream _stream;
Solução
Utilize um método de limpeza que seja explicitamente chamado em vez do método finalize().
public void free() {
try {
OutputStream stream = getOutputStream();
stream.flush();
stream.close();
}
catch (IOException exc) {
LogUtility.log(exc);
}
}

private OutputStream getOutputStream() {
return _stream;
}

private transient OutputStream _stream;