public ConexaoBD() throws ClassNotFoundException, SQLException, InstantiationException, IllegalAccessException {
			Class.forName("org.postgresql.Driver").newInstance();

			myConnection = DriverManager.getConnection("jdbc:postgresql:"
					+ "//localhost/ControleDeQualidade?user=postgres&password=postgres");

			//Cria um comando (statement) vinculado aa conexao
			st = myConnection.createStatement();
	}