diff --git a/src/main/java/com/drtshock/playervaults/PlayerVaults.java b/src/main/java/com/drtshock/playervaults/PlayerVaults.java
index 1b53bde..c26cb6f 100644
--- a/src/main/java/com/drtshock/playervaults/PlayerVaults.java
+++ b/src/main/java/com/drtshock/playervaults/PlayerVaults.java
@@ -91,10 +91,10 @@ public class PlayerVaults extends JavaPlugin {
     private String _versionString;
     private int maxVaultAmountPermTest;
     private Metrics metrics;
-    private Config config = new Config();
+    private final Config config = new Config();
     private BukkitAudiences platform;
-    private Translation translation = new Translation(this);
-    private List<String> exceptions = new CopyOnWriteArrayList<>();
+    private final Translation translation = new Translation(this);
+    private final List<String> exceptions = new CopyOnWriteArrayList<>();
 
     public static PlayerVaults getInstance() {
         return instance;
@@ -452,7 +452,7 @@ public class PlayerVaults extends JavaPlugin {
      * Get the legacy UUID vault data folder.
      * Deprecated in favor of base64 data.
      *
-     * @return
+     * @return uuid folder
      */
     @Deprecated
     public File getUuidData() {
diff --git a/src/main/java/com/drtshock/playervaults/config/Loader.java b/src/main/java/com/drtshock/playervaults/config/Loader.java
index d025ee0..0dd9759 100644
--- a/src/main/java/com/drtshock/playervaults/config/Loader.java
+++ b/src/main/java/com/drtshock/playervaults/config/Loader.java
@@ -76,7 +76,7 @@ public class Loader {
         return Loader.loadNode(config, configObject);
     }
 
-    private static Set<Class<?>> types = new HashSet<>();
+    private static final Set<Class<?>> types = new HashSet<>();
 
     static {
         Loader.types.add(Boolean.TYPE);
diff --git a/src/main/java/com/drtshock/playervaults/config/file/Config.java b/src/main/java/com/drtshock/playervaults/config/file/Config.java
index b8a60b3..71d8f23 100644
--- a/src/main/java/com/drtshock/playervaults/config/file/Config.java
+++ b/src/main/java/com/drtshock/playervaults/config/file/Config.java
@@ -25,7 +25,7 @@ import java.util.Collections;
 import java.util.List;
 import java.util.logging.Logger;
 
-@SuppressWarnings({"FieldCanBeLocal", "InnerClassMayBeStatic", "unused"})
+@SuppressWarnings({"FieldMayBeFinal", "FieldCanBeLocal", "InnerClassMayBeStatic", "unused"})
 public class Config {
     public class Block {
         private boolean enabled = true;
diff --git a/src/main/java/com/drtshock/playervaults/vaultmanagement/VaultHolder.java b/src/main/java/com/drtshock/playervaults/vaultmanagement/VaultHolder.java
index 8bf8e1e..651335d 100644
--- a/src/main/java/com/drtshock/playervaults/vaultmanagement/VaultHolder.java
+++ b/src/main/java/com/drtshock/playervaults/vaultmanagement/VaultHolder.java
@@ -27,7 +27,7 @@ import org.bukkit.inventory.InventoryHolder;
 public class VaultHolder implements InventoryHolder {
 
     private Inventory inventory;
-    private int vaultNumber;
+    private final int vaultNumber;
 
     /**
      * Creates a new vault holder
diff --git a/src/main/java/com/drtshock/playervaults/vaultmanagement/VaultManager.java b/src/main/java/com/drtshock/playervaults/vaultmanagement/VaultManager.java
index 1bec04c..6428a78 100644
--- a/src/main/java/com/drtshock/playervaults/vaultmanagement/VaultManager.java
+++ b/src/main/java/com/drtshock/playervaults/vaultmanagement/VaultManager.java
@@ -220,7 +220,7 @@ public class VaultManager {
     /**
      * Gets the numbers belonging to all their vaults.
      *
-     * @param holder
+     * @param holder holder
      * @return a set of Integers, which are player's vaults' numbers (fuck grammar).
      */
     public Set<Integer> getVaultNumbers(String holder) {
@@ -326,7 +326,6 @@ public class VaultManager {
      * Attempt to delete a vault file.
      *
      * @param holder UUID of the holder.
-     * @return true if successful, otherwise false.
      */
     public void deletePlayerVaultFile(String holder) {
         File file = new File(this.directory, holder + ".yml");