import org.apache.commons.codec.binary.Base64;
import org.apache.commons.codec.binary.Hex;
import org.apache.commons.io.IOUtils;
import org.apache.commons.io.output.NullOutputStream;
import org.apache.commons.net.ftp.FTPClient;
<BUG>import org.apache.tools.zip.ZipFile;
import javax.annotation.Nullable;</BUG>
import java.io.*;
import java.nio.charset.Charset;
import java.security.DigestInputStream;

import org.apache.commons.codec.binary.Base64;
import org.apache.commons.codec.binary.Hex;
import org.apache.commons.io.IOUtils;
import org.apache.commons.io.output.NullOutputStream;
import org.apache.commons.net.ftp.FTPClient;
import org.apache.tools.zip.ZipFile;
import javax.annotation.Nonnull;
import javax.annotation.Nullable;
import java.io.*;
import java.nio.charset.Charset;
import java.security.DigestInputStream;
