Split from a huge YAML to several files

YAMLSplitter.java

package org.example;

import java.io.File;
import java.io.FileInputStream;
import java.io.FileWriter;
import java.io.IOException;
import java.util.Map;

import org.yaml.snakeyaml.DumperOptions;
import org.yaml.snakeyaml.Yaml;

public class YAMLSplitter {

    public static void main(String[] args) throws Exception {
        DumperOptions dop = new DumperOptions();
        dop.setPrettyFlow(true);
        dop.setSplitLines(true);
        dop.setDefaultFlowStyle(DumperOptions.FlowStyle.BLOCK);
        Yaml yaml = new Yaml(dop);
        try (FileInputStream fis= new FileInputStream("path-to-huge.yaml")) {
            yaml.loadAll(fis).forEach((item) -> {
                if (item == null) return;
                String id = ((Map<String,String>)item).get("id");
                //System.out.println(yaml.dump(item));
                try {
                    File f = new File("target-dir", id);
                    try (FileWriter fw = new FileWriter(f)) {
                        yaml.dump(item,fw);
                    }
                } catch (IOException e) {
                    e.printStackTrace();
                }
            });

        }
    }
}