Start working on per player data files

core/src/main/java/us/crazycrew/crazyauctions/data/ProfileCache.java

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+package us.crazycrew.crazyauctions.data;
+
+import java.util.UUID;
+
+public interface ProfileCache {
+
+    void load();
+
+    void save();
+
+    void add(final UUID uuid);
+
+    String getName(final UUID uuid);
+
+}

platforms/paper/src/main/java/us/crazycrew/crazyauctions/configs/StorageManager.java

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+package us.crazycrew.crazyauctions.configs;
+
+public class StorageManager {
+
+}

platforms/paper/src/main/java/us/crazycrew/crazyauctions/configs/data/PlayerData.java

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+package us.crazycrew.crazyauctions.configs.data;
+
+import com.google.gson.annotations.Expose;
+import us.crazycrew.crazyauctions.api.interfaces.Universal;
+import us.crazycrew.crazycore.files.FileExtension;
+import java.nio.file.Path;
+import java.util.UUID;
+import java.util.concurrent.ConcurrentHashMap;
+
+public class PlayerData extends FileExtension implements Universal {
+
+    @Expose
+    public static ConcurrentHashMap<UUID, String> auctions = new ConcurrentHashMap<>();
+
+    public PlayerData(UUID uuid) {
+        super(uuid + ".json", plugin.getUsers());
+    }
+
+    public static void load(UUID uuid) {
+        plugin.getCrazyCore().getFileHandler().addFile(new PlayerData(uuid));
+    }
+
+    public static void save(UUID uuid) {
+        plugin.getCrazyCore().getFileHandler().saveFile(new PlayerData(uuid));
+    }
+
+    /**
+     * Fetch the uuid file of the player.
+     *
+     * @param playerData the path i.e. 'CrazyAuctions/userdata/random-uuid.'
+     * @return the complete path
+     */
+    public static Path getFile(Path playerData, UUID uuid) {
+        return playerData.resolve(uuid + ".json");
+    }
+}

platforms/paper/src/main/java/us/crazycrew/crazyauctions/events/TestListener.java

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+package us.crazycrew.crazyauctions.events;
+
+import org.bukkit.event.EventHandler;
+import org.bukkit.event.Listener;
+import org.bukkit.event.player.PlayerJoinEvent;
+import org.bukkit.event.player.PlayerQuitEvent;
+import us.crazycrew.crazyauctions.api.interfaces.Universal;
+import us.crazycrew.crazyauctions.configs.data.PlayerData;
+import java.io.File;
+
+public class TestListener implements Listener, Universal {
+
+    @EventHandler
+    public void onPlayerJoin(PlayerJoinEvent event) {
+        PlayerData.load(event.getPlayer().getUniqueId());
+    }
+
+    @EventHandler
+    public void onPlayerQuit(PlayerQuitEvent event) {
+        File playerData = PlayerData.getFile(plugin.getUsers(), event.getPlayer().getUniqueId()).toFile();
+
+        PlayerData.save(event.getPlayer().getUniqueId());
+    }
+}