Initial version

src/main/java/me/firephoenix/deathcounter/DeathCounter.java

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+package me.firephoenix.deathcounter;
+
+import me.clip.placeholderapi.PlaceholderAPI;
+import me.firephoenix.deathcounter.listener.DeathListener;
+import org.bukkit.Bukkit;
+import org.bukkit.plugin.java.JavaPlugin;
+
+import java.sql.*;
+import java.util.HashMap;
+import java.util.UUID;
+import java.util.logging.Level;
+
+public final class DeathCounter extends JavaPlugin {
+    public String dataBaseURL;
+    public HashMap<UUID, Integer> playerDeaths = new HashMap<>();
+
+    public HashMap<UUID, Integer> getPlayerDeaths() {
+        return playerDeaths;
+    }
+
+    public String getDataBaseURL() {
+        return dataBaseURL;
+    }
+
+    @Override
+    public void onEnable() {
+        // Plugin startup logic
+        this.saveDefaultConfig();
+
+        Bukkit.getServer().getPluginManager().registerEvents(new DeathListener(this), this);
+
+        dataBaseURL = "jdbc:sqlite:" + this.getDataPath() + "/deaths.db";
+
+        createSqLiteDatabase();
+
+        if (Bukkit.getPluginManager().isPluginEnabled("PlaceholderAPI")) { //
+            new DeathPlaceholderExpansion(this).register(); //
+        }
+    }
+
+    private void createSqLiteDatabase() {
+        try (var conn = DriverManager.getConnection(dataBaseURL)) {
+            if (conn != null) {
+                String sql = "CREATE TABLE IF NOT EXISTS deaths_counts ("
+                        + " id BIGINT auto_increment,"
+                        + " uuid VARCHAR(36) NOT NULL UNIQUE,"
+                        + " deaths BIGINT NOT NULL,"
+                        + " primary key (id));";
+
+                Statement statement = conn.createStatement();
+                statement.execute(sql);
+            }
+        } catch (SQLException e) {
+            Bukkit.getLogger().log(Level.WARNING, e.getMessage());
+        }
+    }
+
+    public int requestDeathCountForPlayer(UUID uuid) {
+        //Search our cache first
+        if (getPlayerDeaths().containsKey(uuid)) {
+            return getPlayerDeaths().get(uuid);
+        } else {
+            int deaths = 0;
+            try (var conn = DriverManager.getConnection(this.getDataBaseURL())) {
+                if (conn != null) {
+                    String getSQL = "SELECT deaths FROM deaths_counts WHERE uuid = " + "'" + uuid + "'" + ";";
+
+                    Statement statement = conn.createStatement();
+                    ResultSet resultSet = statement.executeQuery(getSQL);
+
+                    if (resultSet.next()) {
+                        deaths = resultSet.getInt(1);
+                    }
+                }
+            } catch (SQLException e) {
+                throw new RuntimeException(e);
+            }
+
+            getPlayerDeaths().put(uuid, deaths);
+
+            return deaths;
+        }
+    }
+
+    @Override
+    public void onDisable() {
+        // Plugin shutdown logic
+    }
+}

src/main/java/me/firephoenix/deathcounter/DeathPlaceholderExpansion.java

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+package me.firephoenix.deathcounter;
+
+import me.clip.placeholderapi.expansion.PlaceholderExpansion;
+import org.bukkit.OfflinePlayer;
+import org.bukkit.entity.Player;
+import org.jetbrains.annotations.NotNull;
+
+import java.util.ArrayList;
+import java.util.List;
+
+/**
+ * @author NieGestorben
+ * Copyright© (c) 2025, All Rights Reserved.
+ */
+public class DeathPlaceholderExpansion extends PlaceholderExpansion {
+
+    DeathCounter plugin;
+
+    public DeathPlaceholderExpansion(DeathCounter plugin) {
+        this.plugin = plugin;
+    }
+
+    @Override
+    public @NotNull List<String> getPlaceholders() {
+        ArrayList<String> placeholders = new ArrayList<>();
+        placeholders.add("%deathcount%");
+
+        return placeholders;
+    }
+
+    @Override
+    public String onRequest(OfflinePlayer player, @NotNull String params) {
+        int deaths = plugin.requestDeathCountForPlayer(player.getUniqueId());
+
+        return String.valueOf(deaths);
+    }
+
+    @Override
+    public String onPlaceholderRequest(Player player, @NotNull String params) {
+        int deaths = plugin.requestDeathCountForPlayer(player.getUniqueId());
+
+        return String.valueOf(deaths);
+    }
+
+    @Override
+    public @NotNull String getIdentifier() {
+        return "deathcounter";
+    }
+
+    @Override
+    public @NotNull String getAuthor() {
+        return "NieGestorben";
+    }
+
+    @Override
+    public @NotNull String getVersion() {
+        return "1.0.0";
+    }
+}

src/main/java/me/firephoenix/deathcounter/listener/DeathListener.java

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+package me.firephoenix.deathcounter.listener;
+
+import me.firephoenix.deathcounter.DeathCounter;
+import org.bukkit.Bukkit;
+import org.bukkit.event.EventHandler;
+import org.bukkit.event.Listener;
+import org.bukkit.event.entity.PlayerDeathEvent;
+
+import java.sql.*;
+import java.util.UUID;
+import java.util.logging.Level;
+
+/**
+ * @author NieGestorben
+ * Copyright© (c) 2025, All Rights Reserved.
+ */
+public class DeathListener implements Listener {
+
+    public DeathCounter plugin;
+
+    public DeathListener(DeathCounter plugin) {
+        this.plugin = plugin;
+    }
+
+    @EventHandler
+    public void onPlayerDeath(PlayerDeathEvent event) {
+        UUID playerUUID = event.getPlayer().getUniqueId();
+
+        try (var conn = DriverManager.getConnection(plugin.getDataBaseURL())) {
+            if (conn != null) {
+                int deaths = plugin.requestDeathCountForPlayer(playerUUID);
+
+                deaths++;
+
+                //Updated cache
+                plugin.getPlayerDeaths().replace(playerUUID, deaths);
+
+                String updateSQL = "REPLACE INTO deaths_counts (uuid, deaths) VALUES ('" + playerUUID + "', " + deaths + ");";
+
+                Statement updateStatement = conn.createStatement();
+                updateStatement.execute(updateSQL);
+            }
+        } catch (SQLException e) {
+            Bukkit.getLogger().log(Level.WARNING, e.getMessage());
+        }
+    }
+
+}