Base64 encoding and decoding in Java

So today I found myself needing to test base64 encoding in Java so I could compare the same results on the RPG end. Being that it took me longer than necessary to put the code together I thought I would post it online. Note this code is compiled using JDK 1.5 (aka 5.0).

import java.io.FileInputStream;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.InputStream;
import java.io.OutputStream;

import org.apache.xerces.impl.dv.util.Base64;

public class Base64CopyToFrom {

    public static void main(String args[]) {

     base64EncodeFile("c:/temp/newimage.tif", "c:/temp/newimage_base64encoded.txt");
     base64DecodeFile("c:/temp/newimage_base64encoded.txt", "c:/temp/newimage_1.tif");

    }

    static void base64EncodeFile(String fileToEncode, String resultingFile){
        InputStream is = null;
        OutputStream os = null;

        try {
            is = new FileInputStream(fileToEncode);
            os = new FileOutputStream(resultingFile);
            int bytesRead = 0;
            int chunkSize = 10000000;
            byte[] chunk = new byte[chunkSize];
            while ((bytesRead = is.read(chunk)) > 0) {
                byte[] ba = new byte[bytesRead];

                for(int i=0; i
                    ba[i] = chunk[i];
                }

                String encStr = Base64.encode(ba);
                os.write(encStr.getBytes(), 0, encStr.length());
            }

        } catch (Exception e) {
            e.printStackTrace();
        } finally {
            try {
                is.close();
            } catch (IOException e) {
                e.printStackTrace();
            }
            try {
                os.close();
            } catch (IOException e) {
                e.printStackTrace();
            }
        }
    }

    static void base64DecodeFile(String fileToDecode, String resultingFile){
        InputStream is = null;
        OutputStream os = null;

        try {
            is = new FileInputStream(fileToDecode);
            os = new FileOutputStream(resultingFile);
            int bytesRead = 0;
            int chunkSize = 10000000;
            byte[] chunk = new byte[chunkSize];
            while ((bytesRead = is.read(chunk)) > 0) {
                byte[] ba = new byte[bytesRead];

                for(int i=0; i
                    ba[i] = chunk[i];
                }

                ba = Base64.decode(new String(ba));
                os.write(ba, 0, ba.length);
            }

        } catch (Exception e) {
            e.printStackTrace();
        } finally {
            try {
                is.close();
            } catch (IOException e) {
                e.printStackTrace();
            }
            try {
                os.close();
            } catch (IOException e) {
                e.printStackTrace();
            }
        }
    }

}