Java Utililty Methods JDBC Connection Create

Connection connection = null;
try {
    loadProperties();
    String location = properties.getProperty("db.location"); 
    DB_DRIVER = properties.getProperty("db.driver");
    DB_USER = properties.getProperty("db.username");
    DB_PASSWORD = properties.getProperty("db.password");
    URL = properties.getProperty(location + ".url");
...

if (connection == null) {
    Properties p = new Properties();
    FileInputStream in = new FileInputStream("test_files/stress/database.properties");
    p.load(in);
    in.close();
    Class.forName(p.getProperty("DatabaseDriver"));
    return DriverManager.getConnection(p.getProperty("DatabaseUrl"), p.getProperty("username"),
            p.getProperty("password"));
...

if (connection == null) {
    connection = DriverManager.getConnection(url, username, password);
return connection;

Connection con = null;
try {
    con = DriverManager.getConnection(url, username, password);
} catch (Exception e) {
    e.printStackTrace();
return con;

Connection con = null;
try {
    Class.forName(db_driver);
} catch (ClassNotFoundException e) {
    System.out.println("3-ClassNotFoundException");
    e.printStackTrace();
    return null;
try {
    con = DriverManager.getConnection(db_url, db_userName, db_passWord);
} catch (SQLException e) {
    System.out.println("4-SQLException");
    e.printStackTrace();
    return null;
return con;

Connection con = conList.get();
if (con == null) {
    try {
        con = DriverManager.getConnection(url, username, password);
        conList.set(con);
    } catch (Exception e) {
        throw new RuntimeException(e);
return con;

Properties prop = new Properties();
FileInputStream fis = null;
try {
    fis = new FileInputStream(DATABASE_PROPERTY_FILE_PATH);
    prop.load(fis);
} finally {
    if (fis != null) {
        fis.close();
...

return DriverManager.getConnection(props.getProperty("url"), props.getProperty("username"),
        props.getProperty("password"));

return DriverManager.getConnection(connectUrl);

Class.forName(driver).newInstance();
return DriverManager.getConnection(url);