[Projeto] Gerando um arquivo Json

package br.com.alura.Principal;

import br.com.alura.screenmatch.excecao.ErroDeConversaoDeAnoException;
import br.com.alura.screenmatch.modelos.Titulo;
import br.com.alura.screenmatch.modelos.TituloOmdb;
import com.google.gson.FieldNamingPolicy;
import com.google.gson.Gson;
import com.google.gson.GsonBuilder;
import java.io.FileWriter;
import java.io.IOException;
import java.net.URI;
import java.net.URLEncoder;
import java.net.http.HttpClient;
import java.net.http.HttpRequest;
import java.net.http.HttpResponse;
import java.nio.charset.StandardCharsets;
import java.util.ArrayList;
import java.util.List;


public class PrincipalComBusca {
    public static void main(String[] args) throws IOException, InterruptedException {
        Scanner leitura = new Scanner ( System.in );
        String busca = "";
        List<Titulo> titulos = new ArrayList<> ( );

        Gson gson = new GsonBuilder ( )
                .setFieldNamingPolicy ( FieldNamingPolicy.UPPER_CAMEL_CASE )
                .setPrettyPrinting ()
                .create ( );


        while (!busca.equalsIgnoreCase ( "sair" )) {

            System.out.println ( "Digite o título do filme para busca: " );
            busca = leitura.nextLine ( );

            if (busca.equalsIgnoreCase ( "sair" )) {
                break;
            }

            String tituloCodificado = URLEncoder.encode ( busca, StandardCharsets.UTF_8 );
            String endereco = "https://www.omdbapi.com/?t=" + tituloCodificado + "&apikey=479a1bfc";
            try {
                HttpClient client = HttpClient.newHttpClient ( );
                HttpRequest request = HttpRequest.newBuilder ( )
                        .uri ( URI.create ( endereco ) )
                        .build ( );
                HttpResponse<String> response = client
                        .send ( request, HttpResponse.BodyHandlers.ofString ());

                String json = response.body ( );
                System.out.println (json);

                TituloOmdb meuTituloOmdb = gson.fromJson (json, TituloOmdb.class );
                System.out.println ( meuTituloOmdb );

                Titulo meuTitulo = new Titulo ( meuTituloOmdb );
                System.out.println ( "Titulo ja convertido" );
                System.out.println ( meuTitulo );

                titulos.add ( meuTitulo );
            } catch (NumberFormatException e) {
                System.out.println ( "Aconteceu um erro: " );
                System.out.println ( e.getMessage ( ) );
            } catch (IllegalArgumentException e) {
                System.out.println ( "Algum erro de argumento na busca, verifique o endereco" );
            } catch (ErroDeConversaoDeAnoException e) {
                System.out.println ( e.getMessage ( ) );
            }
        }
        System.out.println ( titulos );
        FileWriter escrita = new FileWriter ( "filmes.json" );
        escrita.write ( gson.toJson(titulos) );
        escrita.close ( );

        System.out.println ( "O programa finalizou corretamente!" );
    }

}