/**
     * Construct. 
     *
     *  @param the name of file containing the answers
     *  @exception thrown when there is no file.
     */
    public  BusinessLogic(String fileName) throws Exception {
       DataSource data = new LocalFileDataSource(fileName);
       data.loadAnswers();
       answers = data.getAnswers();
    } 

    /**
     * Gets all the answers.  
     *
     *  @return all the answer
     */
    public List getAnswers() {
        return answers;
    }