SoundManager.class & SoundFolder.class

public class SoundManager{

    private final String path;
    private final String domain;
    private final String name;

    private final List<SoundFolder> soundFolders=new ArrayList<SoundFolder>();
    private final Map<String,SoundEvent> soundEvents=new HashMap<String,SoundEvent>();

    public SoundManager(String name, String pathResourcePackParent, String resourcePackDomain){
        this.path=pathResourcePackParent;
        this.domain=resourcePackDomain;
        this.name=name;
    }

    public void registerSoundFolder(SoundFolder soundFolder){
        this.soundFolders.add(soundFolder);
    }

    public void registerSounds(){
        createSoundsJSON();
        for(SoundFolder folder:this.soundFolders){
            List<String> sounds=folder.getSoundList();
            for(String sound:sounds){
                if(!this.soundEvents.containsKey(folder.getFolderName()+"."+sound))
                    this.soundEvents.put(folder.getFolderName()+"."+sound, registerSound(this.name+"."+folder.getFolderName()+"."+sound));
            }
        }
    }

    private final SoundEvent registerSound(String name){
        ResourceLocation sound=new ResourceLocation(this.domain,name);
        return GameRegistry.register(new SoundEvent(sound).setRegistryName(sound));
    }

    private void createSoundsJSON(){
        JsonObject soundObj=new JsonObject();
        for(SoundFolder folder:this.soundFolders){
            List<String> sounds=folder.getSoundList();
            for(String sound:sounds){
                JsonObject soundFile=new JsonObject();
                JsonArray data=new JsonArray();
                JsonObject soundDetails=new JsonObject();

                soundObj.add(this.name+"."+folder.getFolderName()+"."+sound, soundFile);

                soundFile.addProperty("category", folder.getSoundCategory());
                soundFile.add("sounds", data);

                data.add(soundDetails);

                soundDetails.addProperty("name", this.getResourcePackDomain()+":"+folder.getFolderName()+"/"+sound);
                soundDetails.addProperty("stream", folder.getIsStreaming());
            }
        }

        try (Writer file = new FileWriter(this.path+"/"+this.getResourcePackDomain()+"/sounds.json")) {
            Gson gson=new GsonBuilder().setPrettyPrinting().create();
            gson.toJson(soundObj,file);
        } catch (IOException e) {
            e.printStackTrace();
        }
    }

    //GETTERS & SETTERS

    public final List<SoundFolder> getSoundFolders(){
        return this.soundFolders;
    }

    public final String getPath(){
        return this.path;
    }

    public final String getResourcePackDomain(){
        return this.domain;
    }

    public final SoundEvent getSound(String sound){
        return this.soundEvents.get(sound);
    }

    public final String getName(){
        return this.name;
    }
}

public class SoundFolder{

    private final String folderName;
    private final String soundCategory;
    private final boolean stream;
    private final List<String> soundList=new ArrayList<String>();
    private final SoundManager sndManager;

    public SoundFolder(String folderName, SoundManager manager, SoundCategory soundCategory, boolean stream){
        this.folderName=folderName;
        this.sndManager=manager;
        this.soundCategory=soundCategory.getName();
        this.stream=stream;
    }

    public String getFolderName(){
        return this.folderName;
    }

    public List<String> getSoundList(){
        this.listSounds(this.sndManager.getResourcePackDomain(), this.sndManager.getPath());
        return this.soundList;
    }

    public String getSoundCategory(){
        return this.soundCategory;
    }

    public boolean getIsStreaming(){
        return this.stream;
    }

    public boolean folderExists(){
        File file=new File(sndManager.getPath()+"/"+sndManager.getResourcePackDomain()+"/sounds/"+this.folderName);
        return file.exists();
    }

    private void listSounds(String domain, String path){
        if(folderExists()){
            File dirPath=new File(this.sndManager.getPath()+"/"+this.sndManager.getResourcePackDomain()+"/sounds/"+this.folderName);
            if(dirPath.exists()){
                List<File> soundFiles=(List<File>) FileUtils.listFiles(dirPath, new String[] {"ogg"}, false);
                for(File file:soundFiles){
                    try {
                        this.soundList.add(FilenameUtils.getBaseName(file.getCanonicalPath()));
                    } catch (IOException e) {
                        e.printStackTrace();
                    }
                }
            }
        }else
            new File(sndManager.getPath()+"/"+sndManager.getResourcePackDomain()+"/sounds/"+this.folderName).mkdir();
    }
}