Review

class WordUtils {
    /**
     * <p>Converts all the whitespace separated words in a String into capitalized words, 
     * that is each word is made up of a titlecase character and then a series of 
     * lowercase characters.  </p>
     *
     * <p>Whitespace is defined by {@link Character#isWhitespace(char)}.
     * A <code>null</code> input String returns <code>null</code>.
     * Capitalization uses the unicode title case, normally equivalent to
     * upper case.</p>
     *
     * <pre>
     * WordUtils.capitalizeFully(null)        = null
     * WordUtils.capitalizeFully("")          = ""
     * WordUtils.capitalizeFully("i am FINE") = "I Am Fine"
     * </pre>
     * 
     * @param str  the String to capitalize, may be null
     * @return capitalized String, <code>null</code> if null String input
     */
    public static String capitalizeFully(String str) {
        return capitalizeFully(str, null);
    }

}