static void cleanUpPipeline() {
    String jdbcUrl = String.format(
            "jdbc:postgresql://google/%s?cloudSqlInstance=%s"
                + "&socketFactory=com.google.cloud.sql.postgres.SocketFactory",
            "xxxxxx",
            "xxxxxx");

    try {
        Class.forName("org.postgresql.Driver");
        Connection connection = DriverManager.getConnection(jdbcUrl, "xxxxxx", "xxxxxx");
    } catch (SQLException | ClassNotFoundException e) {
        e.printStackTrace();
    }
}

<dependency>
    <groupId>com.google.cloud.sql</groupId>
    <artifactId>postgres-socket-factory</artifactId>
    <version>1.0.11</version>
</dependency>

<dependency>
    <groupId>org.postgresql</groupId>
    <artifactId>postgresql</artifactId>
    <version>42.2.5</version>
</dependency>