diff --git a/bukkit/src/main/java/net/william278/husksync/data/BukkitInventoryMap.java b/bukkit/src/main/java/net/william278/husksync/data/BukkitInventoryMap.java
index b336b563..6233339b 100644
--- a/bukkit/src/main/java/net/william278/husksync/data/BukkitInventoryMap.java
+++ b/bukkit/src/main/java/net/william278/husksync/data/BukkitInventoryMap.java
@@ -8,6 +8,7 @@ import java.util.Optional;
 /**
  * A mapped player inventory, providing methods to easily access a player's inventory.
  */
+@SuppressWarnings("unused")
 public class BukkitInventoryMap {
 
     private ItemStack[] contents;
diff --git a/bukkit/src/main/java/net/william278/husksync/event/BukkitEvent.java b/bukkit/src/main/java/net/william278/husksync/event/BukkitEvent.java
index a4be0305..6a1c4565 100644
--- a/bukkit/src/main/java/net/william278/husksync/event/BukkitEvent.java
+++ b/bukkit/src/main/java/net/william278/husksync/event/BukkitEvent.java
@@ -1,13 +1,8 @@
 package net.william278.husksync.event;
 
 import net.william278.husksync.BukkitHuskSync;
-import net.william278.husksync.player.BukkitPlayer;
-import net.william278.husksync.player.OnlineUser;
 import org.bukkit.Bukkit;
-import org.bukkit.entity.Player;
 import org.bukkit.event.Event;
-import org.bukkit.event.player.PlayerEvent;
-import org.jetbrains.annotations.NotNull;
 
 import java.util.concurrent.CompletableFuture;
 
diff --git a/bukkit/src/main/java/net/william278/husksync/event/BukkitPreSyncEvent.java b/bukkit/src/main/java/net/william278/husksync/event/BukkitPreSyncEvent.java
index b54fed9b..5320621c 100644
--- a/bukkit/src/main/java/net/william278/husksync/event/BukkitPreSyncEvent.java
+++ b/bukkit/src/main/java/net/william278/husksync/event/BukkitPreSyncEvent.java
@@ -1,8 +1,6 @@
 package net.william278.husksync.event;
 
 import net.william278.husksync.data.UserData;
-import net.william278.husksync.player.BukkitPlayer;
-import net.william278.husksync.player.OnlineUser;
 import org.bukkit.entity.Player;
 import org.bukkit.event.Cancellable;
 import org.bukkit.event.HandlerList;
diff --git a/bukkit/src/main/java/net/william278/husksync/event/BukkitSyncCompleteEvent.java b/bukkit/src/main/java/net/william278/husksync/event/BukkitSyncCompleteEvent.java
index c15bd0f1..eb54f905 100644
--- a/bukkit/src/main/java/net/william278/husksync/event/BukkitSyncCompleteEvent.java
+++ b/bukkit/src/main/java/net/william278/husksync/event/BukkitSyncCompleteEvent.java
@@ -1,7 +1,5 @@
 package net.william278.husksync.event;
 
-import net.william278.husksync.player.BukkitPlayer;
-import net.william278.husksync.player.OnlineUser;
 import org.bukkit.entity.Player;
 import org.bukkit.event.HandlerList;
 import org.jetbrains.annotations.NotNull;
diff --git a/bukkit/src/main/java/net/william278/husksync/util/BukkitLogger.java b/bukkit/src/main/java/net/william278/husksync/util/BukkitLogger.java
index 068f0990..c6941e92 100644
--- a/bukkit/src/main/java/net/william278/husksync/util/BukkitLogger.java
+++ b/bukkit/src/main/java/net/william278/husksync/util/BukkitLogger.java
@@ -1,11 +1,9 @@
 package net.william278.husksync.util;
 
 import de.themoep.minedown.MineDown;
-import net.md_5.bungee.api.chat.ComponentBuilder;
 import net.md_5.bungee.api.chat.TextComponent;
 import org.jetbrains.annotations.NotNull;
 
-import java.util.Arrays;
 import java.util.logging.Level;
 
 public class BukkitLogger extends Logger {
diff --git a/common/src/main/java/net/william278/husksync/command/EnderChestCommand.java b/common/src/main/java/net/william278/husksync/command/EnderChestCommand.java
index b071c44d..2550da66 100644
--- a/common/src/main/java/net/william278/husksync/command/EnderChestCommand.java
+++ b/common/src/main/java/net/william278/husksync/command/EnderChestCommand.java
@@ -2,7 +2,6 @@ package net.william278.husksync.command;
 
 import net.william278.husksync.HuskSync;
 import net.william278.husksync.data.DataSaveCause;
-import net.william278.husksync.data.ItemData;
 import net.william278.husksync.data.UserData;
 import net.william278.husksync.data.UserDataSnapshot;
 import net.william278.husksync.editor.ItemEditorMenu;
diff --git a/common/src/main/java/net/william278/husksync/command/HuskSyncCommand.java b/common/src/main/java/net/william278/husksync/command/HuskSyncCommand.java
index 59817690..3aceda24 100644
--- a/common/src/main/java/net/william278/husksync/command/HuskSyncCommand.java
+++ b/common/src/main/java/net/william278/husksync/command/HuskSyncCommand.java
@@ -71,8 +71,9 @@ public class HuskSyncCommand extends CommandBase implements TabCompletable, Cons
         switch (args[0].toLowerCase()) {
             case "update", "version" ->
                     new UpdateChecker(plugin.getPluginVersion(), plugin.getLoggingAdapter()).logToConsole();
-            case "info", "about" -> plugin.getLoggingAdapter().log(Level.INFO, new MineDown(plugin.getLocales().stripMineDown(
-                    Locales.PLUGIN_INFORMATION.replace("%version%", plugin.getPluginVersion().toString()))));
+            case "info", "about" ->
+                    plugin.getLoggingAdapter().log(Level.INFO, new MineDown(plugin.getLocales().stripMineDown(
+                            Locales.PLUGIN_INFORMATION.replace("%version%", plugin.getPluginVersion().toString()))));
             case "reload" -> {
                 plugin.reload();
                 plugin.getLoggingAdapter().log(Level.INFO, "Reloaded config & message files.");
@@ -92,7 +93,13 @@ public class HuskSyncCommand extends CommandBase implements TabCompletable, Cons
                         return;
                     }
                     switch (args[2]) {
-                        case "start" -> migrator.start();
+                        case "start" -> migrator.start().thenAccept(succeeded -> {
+                            if (succeeded) {
+                                plugin.getLoggingAdapter().log(Level.INFO, "Migration completed successfully!");
+                            } else {
+                                plugin.getLoggingAdapter().log(Level.WARNING, "Migration failed!");
+                            }
+                        });
                         case "set" -> migrator.handleConfigurationCommand(Arrays.copyOfRange(args, 3, args.length));
                         default -> plugin.getLoggingAdapter().log(Level.INFO,
                                 "Invalid syntax. Console usage: \"husksync migrate " + args[1] + " <start/set>");
diff --git a/common/src/main/java/net/william278/husksync/command/InventoryCommand.java b/common/src/main/java/net/william278/husksync/command/InventoryCommand.java
index e294fa28..131b5e7f 100644
--- a/common/src/main/java/net/william278/husksync/command/InventoryCommand.java
+++ b/common/src/main/java/net/william278/husksync/command/InventoryCommand.java
@@ -2,7 +2,6 @@ package net.william278.husksync.command;
 
 import net.william278.husksync.HuskSync;
 import net.william278.husksync.data.DataSaveCause;
-import net.william278.husksync.data.ItemData;
 import net.william278.husksync.data.UserData;
 import net.william278.husksync.data.UserDataSnapshot;
 import net.william278.husksync.editor.ItemEditorMenu;
diff --git a/common/src/main/java/net/william278/husksync/command/TabCompletable.java b/common/src/main/java/net/william278/husksync/command/TabCompletable.java
index 66519ba3..a1cea50c 100644
--- a/common/src/main/java/net/william278/husksync/command/TabCompletable.java
+++ b/common/src/main/java/net/william278/husksync/command/TabCompletable.java
@@ -12,7 +12,7 @@ public interface TabCompletable {
     /**
      * What should be returned when the player or console attempts to TAB-complete a command
      *
-     * @param args Current command argumentsrf
+     * @param args Current command arguments
      * @return List of String arguments to offer TAB suggestions
      */
     List<String> onTabComplete(@NotNull String[] args);
diff --git a/common/src/main/java/net/william278/husksync/database/Database.java b/common/src/main/java/net/william278/husksync/database/Database.java
index 59857130..8c7c4f11 100644
--- a/common/src/main/java/net/william278/husksync/database/Database.java
+++ b/common/src/main/java/net/william278/husksync/database/Database.java
@@ -106,6 +106,7 @@ public abstract class Database {
      * @return Array of string-formatted table creation schema statements
      * @throws IOException if the resource could not be read
      */
+    @SuppressWarnings("SameParameterValue")
     protected final String[] getSchemaStatements(@NotNull String schemaFileName) throws IOException {
         return formatStatementTables(new String(resourceReader.getResource(schemaFileName)
                 .readAllBytes(), StandardCharsets.UTF_8)).split(";");
diff --git a/common/src/main/java/net/william278/husksync/editor/ItemEditorMenu.java b/common/src/main/java/net/william278/husksync/editor/ItemEditorMenu.java
index b1c08de7..7accc80f 100644
--- a/common/src/main/java/net/william278/husksync/editor/ItemEditorMenu.java
+++ b/common/src/main/java/net/william278/husksync/editor/ItemEditorMenu.java
@@ -15,7 +15,7 @@ public class ItemEditorMenu {
     public final ItemData itemData;
     public final ItemEditorMenuType itemEditorMenuType;
     public final MineDown menuTitle;
-    public boolean canEdit;
+    public final boolean canEdit;
 
     private CompletableFuture<ItemData> inventoryDataCompletableFuture;
 
diff --git a/common/src/main/java/net/william278/husksync/event/CancellableEvent.java b/common/src/main/java/net/william278/husksync/event/CancellableEvent.java
index c8f0cba5..c7339391 100644
--- a/common/src/main/java/net/william278/husksync/event/CancellableEvent.java
+++ b/common/src/main/java/net/william278/husksync/event/CancellableEvent.java
@@ -2,7 +2,10 @@ package net.william278.husksync.event;
 
 public interface CancellableEvent extends Event {
 
-    boolean isCancelled();
+    @SuppressWarnings("BooleanMethodIsAlwaysInverted")
+    default boolean isCancelled() {
+        return false;
+    }
 
     void setCancelled(boolean cancelled);
 
diff --git a/common/src/main/java/net/william278/husksync/player/OnlineUser.java b/common/src/main/java/net/william278/husksync/player/OnlineUser.java
index 4daed578..7805065d 100644
--- a/common/src/main/java/net/william278/husksync/player/OnlineUser.java
+++ b/common/src/main/java/net/william278/husksync/player/OnlineUser.java
@@ -11,7 +11,6 @@ import net.william278.husksync.util.Version;
 import org.jetbrains.annotations.NotNull;
 
 import java.util.ArrayList;
-import java.util.Arrays;
 import java.util.List;
 import java.util.UUID;
 import java.util.concurrent.CompletableFuture;
diff --git a/common/src/main/java/net/william278/husksync/player/User.java b/common/src/main/java/net/william278/husksync/player/User.java
index 501056b7..b22fdc7a 100644
--- a/common/src/main/java/net/william278/husksync/player/User.java
+++ b/common/src/main/java/net/william278/husksync/player/User.java
@@ -12,12 +12,12 @@ public class User {
     /**
      * The user's unique account ID
      */
-    public UUID uuid;
+    public final UUID uuid;
 
     /**
      * The user's username
      */
-    public String username;
+    public final String username;
 
     public User(@NotNull UUID uuid, @NotNull String username) {
         this.username = username;
diff --git a/common/src/test/java/net/william278/husksync/player/DummyPlayer.java b/common/src/test/java/net/william278/husksync/player/DummyPlayer.java
index 5ba1eba8..fdd17d46 100644
--- a/common/src/test/java/net/william278/husksync/player/DummyPlayer.java
+++ b/common/src/test/java/net/william278/husksync/player/DummyPlayer.java
@@ -14,13 +14,13 @@ import java.util.concurrent.CompletableFuture;
 
 public class DummyPlayer extends OnlineUser {
 
-    private DummyPlayer(@NotNull UUID uuid, @NotNull String username) {
-        super(uuid, username);
+    private DummyPlayer() {
+        super(UUID.fromString("00000000-0000-0000-0000-000000000000"),
+                "DummyPlayer");
     }
 
     public static DummyPlayer create() {
-        return new DummyPlayer(UUID.fromString("00000000-0000-0000-0000-000000000000"),
-                "DummyPlayer");
+        return new DummyPlayer();
     }
 
     @Override