public void contextDestroyed(ServletContextEvent arg0) {
   try {
     ConfigDBMapper.getInstance().setDefaultConnectionName("fatec");
     Connection conn = ConfigDBMapper.getInstance().getDefaultConnection();
     conn.prepareStatement("COMMIT;").execute();
     conn.prepareStatement("DROP SCHEMA PUBLIC CASCADE;").execute();
   } catch (Exception e) {
     // TODO: handle exception
   }
 }
 public void contextInitialized(ServletContextEvent arg0) {
   try {
     ConfigDBMapper.getInstance().setDefaultConnectionName("fatec");
     Connection conn = ConfigDBMapper.getInstance().getDefaultConnection();
     Database database =
         DatabaseFactory.getInstance().findCorrectDatabaseImplementation(new JdbcConnection(conn));
     Liquibase liquibase =
         new Liquibase(
             "br/com/fatec/aulas/liquibase/changelog-master.xml",
             new ClassLoaderResourceAccessor(),
             database);
     liquibase.forceReleaseLocks();
     liquibase.update("fatec");
     conn.prepareStatement("COMMIT;").execute();
   } catch (Exception e) {
     // TODO: handle exception
   }
 }