diff --git a/src/main/java/fr/hashtek/spigot/breakffa/gui/cosmetics/GuiCosmeticBuy.java b/src/main/java/fr/hashtek/spigot/breakffa/gui/cosmetics/GuiCosmeticBuy.java
index 74c5ae6..fc03eed 100644
--- a/src/main/java/fr/hashtek/spigot/breakffa/gui/cosmetics/GuiCosmeticBuy.java
+++ b/src/main/java/fr/hashtek/spigot/breakffa/gui/cosmetics/GuiCosmeticBuy.java
@@ -61,9 +61,16 @@ public HashItem getItem()
     private final CosmeticManager.CurrentCosmeticSetter<Cosmetic<T>> currentCosmeticSetter;
 
 
+    /**
+     * Creates a new instance of GuiCosmeticBuy.
+     *
+     * @param   parentGui               Parent Gui (instance of {@link GuiCosmeticsCategory})
+     * @param   cosmetic                Cosmetic to buy
+     * @param   ownedCosmeticsGetter    Owned cosmetics getter (from a {@link CosmeticManager} instance)
+     * @param   currentCosmeticSetter   Current cosmetic setter (from a {@link CosmeticManager} instance)
+     */
     public GuiCosmeticBuy(
         GuiCosmeticsCategory<T, E> parentGui,
-        CosmeticManager cosmeticManager,
         Cosmetic<T> cosmetic,
         CosmeticManager.OwnedCosmeticsGetter<Cosmetic<T>> ownedCosmeticsGetter,
         CosmeticManager.CurrentCosmeticSetter<Cosmetic<T>> currentCosmeticSetter
@@ -80,6 +87,11 @@ public GuiCosmeticBuy(
     }
 
 
+    /**
+     * Creates the Gui.
+     *
+     * @param   cosmetic    Cosmetic to buy
+     */
     private void createGui(Cosmetic<T> cosmetic)
     {
         final HashItem cosmeticItem = new HashItem(cosmetic.getMaterial())
@@ -105,6 +117,7 @@ private void createGui(Cosmetic<T> cosmetic)
                             final CosmeticManager playerCosmeticManager =
                                 MAIN.getGameManager().getPlayerManager(player).getCosmeticManager();
 
+                            /* Unlocks the cosmetic for the player. */
                             gui.getOwnedCosmeticsGetter().getOwnedGetter(playerCosmeticManager).get().add(cosmeticToBuy);
                         }
                     ))
@@ -136,6 +149,10 @@ private void createGui(Cosmetic<T> cosmetic)
         mask.apply();
     }
 
+    /**
+     * @param   action  Action to execute before returning to the Parent Gui
+     * @return  Action that returns to the Parent Gui.
+     */
     private ClickAction returnToParentGui(ClickAction action)
     {
         return (Player player, HashGui hashGui, ItemStack item, int slot) -> {
@@ -160,22 +177,34 @@ private ClickAction returnToParentGui(ClickAction action)
         };
     }
 
+    /**
+     * @return  Action that returns to the Parent Gui, without custom action before.
+     */
     private ClickAction returnToParentGui()
     {
         return this.returnToParentGui(null);
     }
 
 
+    /**
+     * @return  Parent Gui (instance of {@link GuiCosmeticsCategory})
+     */
     public GuiCosmeticsCategory<T, E> getParentGui()
     {
         return this.parentGui;
     }
 
+    /**
+     * @return  Cosmetic to buy
+     */
     public Cosmetic<T> getCosmetic()
     {
         return this.cosmetic;
     }
 
+    /**
+     * @return  Owned cosmetics getter (from a {@link CosmeticManager} instance)
+     */
     public CosmeticManager.OwnedCosmeticsGetter<Cosmetic<T>> getOwnedCosmeticsGetter()
     {
         return this.ownedCosmeticsGetter;
diff --git a/src/main/java/fr/hashtek/spigot/breakffa/gui/cosmetics/GuiCosmeticsCategory.java b/src/main/java/fr/hashtek/spigot/breakffa/gui/cosmetics/GuiCosmeticsCategory.java
index ff305bb..f11d137 100644
--- a/src/main/java/fr/hashtek/spigot/breakffa/gui/cosmetics/GuiCosmeticsCategory.java
+++ b/src/main/java/fr/hashtek/spigot/breakffa/gui/cosmetics/GuiCosmeticsCategory.java
@@ -45,17 +45,17 @@ public abstract class GuiCosmeticsCategory<
      * @param   playerCosmeticManager   Player Cosmetic Manager
      * @param   attributes              Category attributes
      * @param   cosmetics               Cosmetic class
-     * @param   ownedCosmeticsGetter    Cosmetics that player currently owns Getter
-     * @param   cosmeticGetter          Cosmetic getter (from a CosmeticManager instance)
-     * @param   cosmeticSetter          Cosmetic setter (from a CosmeticManager instance)
+     * @param   ownedCosmeticsGetter    Owned cosmetics getter (from a {@link CosmeticManager} instance)
+     * @param   currentCosmeticGetter   Current cosmetic getter (from a {@link CosmeticManager} instance)
+     * @param   currentCosmeticSetter   Current cosmetic setter (from a {@link CosmeticManager} instance)
      */
     public GuiCosmeticsCategory(
         CosmeticManager playerCosmeticManager,
         GuiCosmeticsCategoryAttributes attributes,
         Class<E> cosmetics,
         CosmeticManager.OwnedCosmeticsGetter<Cosmetic<T>> ownedCosmeticsGetter,
-        CosmeticManager.CurrentCosmeticGetter<Cosmetic<T>> cosmeticGetter,
-        CosmeticManager.CurrentCosmeticSetter<Cosmetic<T>> cosmeticSetter
+        CosmeticManager.CurrentCosmeticGetter<Cosmetic<T>> currentCosmeticGetter,
+        CosmeticManager.CurrentCosmeticSetter<Cosmetic<T>> currentCosmeticSetter
     )
     {
         super(
@@ -69,8 +69,8 @@ public GuiCosmeticsCategory(
 
         this.cosmetics = cosmetics;
         this.ownedCosmeticsGetter = ownedCosmeticsGetter;
-        this.currentCosmeticGetter = cosmeticGetter;
-        this.currentCosmeticSetter = cosmeticSetter;
+        this.currentCosmeticGetter = currentCosmeticGetter;
+        this.currentCosmeticSetter = currentCosmeticSetter;
 
         this.initializeGui(this.getCategoryTitleItem());
         this.reloadGui(
@@ -129,8 +129,8 @@ private void initializeGui(HashItem titleItem)
     /**
      * Reloads the Gui. Used at each current cosmetic change.
      *
-     * @param   gui                     Gui to update
-     * @param   manager                 Cosmetic Manager
+     * @param   gui         Gui to update
+     * @param   manager     Cosmetic Manager
      */
     public void reloadGui(
         GuiCosmeticsCategory<T, E> gui,
@@ -145,8 +145,8 @@ public void reloadGui(
      * Creates an item for a cosmetic, with the click handlers for buy,
      * select etc...
      *
-     * @param   cosmetic                Cosmetic to add
-     * @param   manager                 Cosmetic Manager (for current / possession detection)
+     * @param   cosmetic    Cosmetic to add
+     * @param   manager     Cosmetic Manager (for current / possession detection)
      * @return  Built item
      */
     private HashItem createCosmeticItem(
@@ -190,7 +190,6 @@ private HashItem createCosmeticItem(
                     if (!gui.getOwnedCosmeticsGetter().getOwnedGetter(playerCosmeticManager).get().contains(cosmetic)) {
                         new GuiCosmeticBuy<T, E>(
                             gui,
-                            playerCosmeticManager,
                             cosmetic,
                             gui.getOwnedCosmeticsGetter(),
                             gui.getCurrentCosmeticSetter()
@@ -213,8 +212,8 @@ private HashItem createCosmeticItem(
     /**
      * Adds a cosmetic to the Gui.
      *
-     * @param   cosmetic                Cosmetic to add
-     * @param   manager                 Cosmetic Manager (for current / possession detection)
+     * @param   cosmetic    Cosmetic to add
+     * @param   manager     Cosmetic Manager (for current / possession detection)
      *
      * @apiNote TODO: Finish this and beautify !
      */
@@ -245,10 +244,7 @@ private void addCosmeticsItems(
     )
     {
         for (E enumConstant : enumClass.getEnumConstants()) {
-            this.addCosmeticItem(
-                enumConstant.getCosmetic(),
-                manager
-            );
+            this.addCosmeticItem(enumConstant.getCosmetic(), manager);
         }
     }
 
@@ -260,6 +256,9 @@ private void addCosmeticsItems(
      */
     public abstract HashItem getCategoryTitleItem();
 
+    /**
+     * @return  Gui's attributes
+     */
     public GuiCosmeticsCategoryAttributes getAttributes()
     {
         return this.attributes;
@@ -273,16 +272,25 @@ public Class<E> getCosmeticsClass()
         return this.cosmetics;
     }
 
+    /**
+     * @return  Owned cosmetics getter (from a {@link CosmeticManager} instance)
+     */
     public CosmeticManager.OwnedCosmeticsGetter<Cosmetic<T>> getOwnedCosmeticsGetter()
     {
         return this.ownedCosmeticsGetter;
     }
 
+    /**
+     * @return  Current cosmetic getter (from a {@link CosmeticManager} instance)
+     */
     public CosmeticManager.CurrentCosmeticGetter<Cosmetic<T>> getCurrentCosmeticGetter()
     {
         return this.currentCosmeticGetter;
     }
 
+    /**
+     * @return  Current cosmetic setter (from a {@link CosmeticManager} instance)
+     */
     public CosmeticManager.CurrentCosmeticSetter<Cosmetic<T>> getCurrentCosmeticSetter()
     {
         return this.currentCosmeticSetter;