An NBT save/load class

SaveController.java

import java.io.File;
import java.io.FileInputStream;
import java.io.FileOutputStream;
import java.io.FilenameFilter;
import java.io.IOException;

import net.minecraft.client.Minecraft;
import net.minecraft.crash.CrashReport;
import net.minecraft.nbt.CompressedStreamTools;
import net.minecraft.nbt.NBTTagCompound;
import net.minecraft.util.ReportedException;

public class SaveController {
    // Semi-hardcoded config folder location
    protected static final String dirName = Minecraft.getMinecraft().mcDataDir + File.separator + "config" + File.separator + "War";
    // File object of aforementioned hardcoded config folder location
    protected static File dir = new File(dirName);

    // Returns the NBTTagCompound content of the specified file, in the specified directory
    public static NBTTagCompound loadConfig(String name, String dirName) {
        System.out.print("[BLA] Loading \"" + name + "\"");

        if (dirName != null) {
            Minecraft.getMinecraft();
            dir = new File(Minecraft.getMinecraft().mcDataDir + File.separator + dirName);
        }

        String fileName = name + ".dat";
        File file = new File(dir, fileName);

        if (!file.exists()) {
            System.out.println(" canceled, file does not exist.");
            return null;
        } else {
            System.out.println(" successful.");
        }
        try {
            return CompressedStreamTools.readCompressed(new FileInputStream(file));
        } catch (IOException e) {
            e.printStackTrace();
        }
        return null;
    }

    // Saves a given NBTTagCompound to the specified file, in the specified directory
    public static void saveConfig(String name, String dirName, NBTTagCompound nbt) {
        System.out.println("[BLA] Saving...");

        if (dirName != null) {
            HUDRegistry.getMinecraftInstance();
            dir = new File(Minecraft.getMinecraft().mcDataDir + File.separator
                    + dirName);
        }

        if (!dir.exists() && !dir.mkdirs())
        // You could replace these crashes by simply logging to console but meh.
            throw new ReportedException(new CrashReport("Unable to create the configuration directories", new Throwable()));

        String fileName = name + ".dat";
        File file = new File(dir, fileName);

        try {
            CompressedStreamTools.writeCompressed(nbt, fileOutputStream);
            fileOutputStream.close();
        } catch (IOException e) {
        // You could replace these crashes by simply logging to console but meh.
            throw new ReportedException(new CrashReport("An error occured while saving", new Throwable()));
        }
    }
}