Detect jdbc driver name from jdbc url.

detect-jdbc-driver-name.scala

def detectDriverNameFromUrl(url : String) : Option[String] = {
    val splits = url.split(":")
    if(splits.length < 2){
      return None
    }
    if(splits(0) != "jdbc"){
      return None
    }

    splits(1).toLowerCase match{
      case "mysql" => Some("com.mysql.jdbc.Driver")
      case "h2" => Some("org.h2.Driver")
      case "postgresql" => Some("org.postgresql.Driver")
      case "oracle" => Some("oracle.jdbc.driver.OracleDriver")
      case "db2" => Some("com.ibm.db2.jcc.DB2Driver")
      case "derby" => Some("org.apache.derby.jdbc.EmbeddedDriver")
      case "microsoft" => Some("com.microsoft.jdbc.sqlserver.SQLServerDriver")
      case _ => None
    }
}