core/src/main/java/com/twitter/elephantbird/util/Codecs.java
public static Base64 createStandardBase64() {
      /* with constructor Base64() in commons-codec-1.4
       * encode() inserts a newline after every 76 characters.
       * Base64(0) disables that incompatibility.
       */
        try {
            return Base64.class.getConstructor(int.class).newInstance(0);
        } catch (SecurityException e) {
        } catch (NoSuchMethodException e) {
        } catch (IllegalArgumentException e) {
        } catch (InstantiationException e) {
        } catch (IllegalAccessException e) {
        } catch (InvocationTargetException e) {
        }
        return new Base64();
    }
public static Base64 createStandardBase64() {
      /* with constructor Base64() in commons-codec-1.4
       * encode() inserts a newline after every 76 characters.
       * Base64(0) disables that incompatibility.
       */
        try {
            return Base64.class.getConstructor(int.class).newInstance(0);
        } catch (SecurityException e) {
        } catch (NoSuchMethodException e) {
        } catch (IllegalArgumentException e) {
        } catch (InstantiationException e) {
        } catch (IllegalAccessException e) {
        } catch (InvocationTargetException e) {
        }
        return new Base64();
    }
Get a instance of standard base64 implementation from apache
commons-codec library
@return standard base64 instance