Java Utililty Methods JDBC H2 Connection

Connection conn = DriverManager.getConnection("jdbc:h2:" + path + ":" + db, userName, pass);
boolean flag;
Statement statement;
statement = conn.createStatement();
flag = statement.execute(CREATETB0);
assert flag;
statement = conn.createStatement();
flag = statement.execute(CREATETB1);
...

if ("sqlite".equals(JDBC_URL.substring(5, 11))) {
    deleteDatabaseSQLITE();
} else {
    deleteDatabaseH2();

Connection conn = DriverManager.getConnection(JDBC_URL, "sa", "");
Statement stmt = conn.createStatement();
try {
    stmt.execute("DROP ALL OBJECTS DELETE FILES");
} finally {
    stmt.close();
    conn.close();

Connection connection = null;
try {
    Class.forName("org.h2.Driver");
    connection = DriverManager.getConnection(
            "jdbc:h2:D:/work/workspace/fork/gs-serving-web-content/initial/data/fdata;DATABASE_TO_UPPER=false",
            "h2", "h2");
} catch (SQLException e) {
    e.printStackTrace();
...

return getConnection(DB_H2_DRIVER, DB_H2_CONNECTION, dbname, DB_H2_USER, DB_H2_PASSWORD);

try {
    System.setProperty("h2.serverCachedObjects", "200000");
    Class.forName("org.h2.Driver");
    return DriverManager.getConnection(String.format("jdbc:h2:%s;DB_CLOSE_ON_EXIT=FALSE;TRACE_LEVEL_FILE=3",
            new File(filename).getAbsolutePath()), "sa", "");
} catch (ClassNotFoundException e) {
    throw new RuntimeException("ERROR: Couldn't load H2 db driver");
} catch (SQLException e) {
...

try {
    Connection connection = DriverManager.getConnection(h2DbJdbcUrl, "sa", null);
    connection.close();
    return true;
} catch (Exception ex) {
    return false;

try {
    h2Connection.rollback(sp);
} catch (Exception e) {
    throw new RuntimeException("DB error on rollback: " + e.toString());

try {
    h2Connection.setAutoCommit(b);
} catch (Exception e) {
    throw new RuntimeException("DB error: failed to set auto commit: " + e.toString());