Add implementation of :
 public ResultSet getTables(String catalog, String schemaPattern, String tableNamePattern, String[] types)
Fix errors in :
 public ResultSet getSchemas()
 public ResultSet getCatalogs()
This one doesn't retur the right types :
 public ResultSet getTableTypes()
Fix implementation of this one with comment of @dain
 public ResultSet getColumns(String catalog, String schemaPattern, String tableNamePattern, String columnNamePattern)