public class Solution {
    public static void main(String[] args) {
        DBConnectionManager dbConnectionManager = new DBConnectionManager();
        try (FakeConnection fakeConnection = dbConnectionManager.getFakeConnection()) {
            System.out.println("Entering body of try block.");
        } catch (Exception e) {
public class FakeConnection implements AutoCloseable {

    public FakeConnection() {
        System.out.println("Establishing database connection...");

    public void unsupportedOperation() {
        System.out.println("Operation is not supported yet!");
        throw new RuntimeException("UnsupportedOperation!");

    public void usefulOperation() {
        System.out.println("Executing useful operation.");

    public void close() throws Exception {
        System.out.println("Closing database connection...");
Output is without RuntimeException: Establishing database connection... Entering body of try block. Executing useful operation. Operation is not supported yet! Closing database connection... We have something like this, and I'm curious, because I though that in unsupportedOperation() we trow new RuntimeException() , but it is not what happened. Why? I don't know how understand teachers acapit from conditions: "Note that the resources were released automatically, despite the fact that an exception was thrown by the unsupportedOperation method. Requirements:"