public void addTag(String tagString) {
		if (tagString == null) 
			return;
		try {
			String statement = new String("INSERT INTO " + TagDBTable 
					+ " (qid, tag)" 
					+ " VALUES (?, ?)");
			PreparedStatement stmt = DBConnection.con.prepareStatement(statement);
			stmt.setInt(1, quizID);
			stmt.setString(2, tagString);
			stmt.executeUpdate();
		} catch (SQLException e) {
			e.printStackTrace();
		}				
	}