code: public Migratory addDbSupport(final String dbName, final Class<? extends DbSupport> dbSupport)
      {
          if (initialized) {
              throw new MigratoryException(Reason.INIT, "Already initialized!");
          }
          dbSupportFactory.addDbSupport(dbName, dbSupport);
          return this;
      }
docs: Add support for an additional database type. The dbName is *not* the canonical name used but the
  name returned from the database engine on the JDBC metadata!