dont know if it works

src/main/java/rip/tilly/bedwars/utils/menusystem/Menu.java

@@ -0,0 +1,63 @@
+package rip.tilly.bedwars.utils.menusystem;
+
+import org.bukkit.Bukkit;
+import org.bukkit.Material;
+import org.bukkit.event.inventory.InventoryClickEvent;
+import org.bukkit.inventory.Inventory;
+import org.bukkit.inventory.InventoryHolder;
+import org.bukkit.inventory.ItemStack;
+import org.bukkit.inventory.meta.ItemMeta;
+import rip.tilly.bedwars.utils.ItemBuilder;
+
+import java.util.Arrays;
+
+public abstract class Menu implements InventoryHolder {
+
+    protected PlayerMenuUtil playerMenuUtil;
+    protected Inventory inventory;
+    protected ItemStack FILLER_GLASS = new ItemBuilder(Material.STAINED_GLASS_PANE).durability(7).name("").build();
+
+    public Menu(PlayerMenuUtil playerMenuUtil) {
+        this.playerMenuUtil = playerMenuUtil;
+    }
+
+    public abstract String getMenuName();
+
+    public abstract int getSlots();
+
+    public abstract void handleMenu(InventoryClickEvent event);
+
+    public abstract void setMenuItems();
+
+    public void open() {
+        inventory = Bukkit.createInventory(this, getSlots(), getMenuName());
+
+        this.setMenuItems();
+
+        playerMenuUtil.getOwner().openInventory(inventory);
+    }
+
+    @Override
+    public Inventory getInventory() {
+        return inventory;
+    }
+
+    public void setFillerGlass(){
+        for (int i = 0; i < this.getSlots(); i++) {
+            if (this.inventory.getItem(i) == null){
+                this.inventory.setItem(i, this.FILLER_GLASS);
+            }
+        }
+    }
+
+    public ItemStack makeItem(Material material, String displayName, String... lore) {
+        ItemStack item = new ItemStack(material);
+        ItemMeta itemMeta = item.getItemMeta();
+        itemMeta.setDisplayName(displayName);
+
+        itemMeta.setLore(Arrays.asList(lore));
+        item.setItemMeta(itemMeta);
+
+        return item;
+    }
+}

src/main/java/rip/tilly/bedwars/utils/menusystem/PaginatedMenu.java

@@ -0,0 +1,44 @@
+package rip.tilly.bedwars.utils.menusystem;
+
+import org.bukkit.ChatColor;
+import org.bukkit.Material;
+
+public abstract class PaginatedMenu extends Menu {
+
+    protected int page = 0;
+    protected int maxItemsPerPage = 28;
+    protected int index = 0;
+
+    public PaginatedMenu(PlayerMenuUtil playerMenuUtil) {
+        super(playerMenuUtil);
+    }
+
+    public void addMenuBorder() {
+        this.inventory.setItem(48, makeItem(Material.WOOD_BUTTON, ChatColor.GREEN + "Left"));
+        this.inventory.setItem(49, makeItem(Material.BARRIER, ChatColor.DARK_RED + "Close"));
+        this.inventory.setItem(50, makeItem(Material.STONE_BUTTON, ChatColor.GREEN + "Right"));
+
+        for (int i = 0; i < 10; i++) {
+            if (this.inventory.getItem(i) == null) {
+                this.inventory.setItem(i, this.FILLER_GLASS);
+            }
+        }
+
+        this.inventory.setItem(17, this.FILLER_GLASS);
+        this.inventory.setItem(18, this.FILLER_GLASS);
+        this.inventory.setItem(26, this.FILLER_GLASS);
+        this.inventory.setItem(27, this.FILLER_GLASS);
+        this.inventory.setItem(35, this.FILLER_GLASS);
+        this.inventory.setItem(36, this.FILLER_GLASS);
+
+        for (int i = 44; i < 54; i++) {
+            if (this.inventory.getItem(i) == null) {
+                this.inventory.setItem(i, this.FILLER_GLASS);
+            }
+        }
+    }
+
+    public int getMaxItemsPerPage() {
+        return maxItemsPerPage;
+    }
+}

src/main/java/rip/tilly/bedwars/utils/menusystem/PlayerMenuUtil.java

@@ -0,0 +1,20 @@
+package rip.tilly.bedwars.utils.menusystem;
+
+import org.bukkit.entity.Player;
+
+public class PlayerMenuUtil {
+
+    private Player owner;
+
+    public PlayerMenuUtil(Player owner) {
+        this.owner = owner;
+    }
+
+    public Player getOwner() {
+        return owner;
+    }
+
+    public void setOwner(Player owner) {
+        this.owner = owner;
+    }
+}