diff --git a/pom.xml b/pom.xml
index 9cc5baf..64e4e4a 100644
--- a/pom.xml
+++ b/pom.xml
@@ -68,5 +68,33 @@
             <version>1.21.1-R0.1-SNAPSHOT</version>
             <scope>provided</scope>
         </dependency>
+
+        <!-- Hibernate Core -->
+        <dependency>
+            <groupId>org.hibernate</groupId>
+            <artifactId>hibernate-core</artifactId>
+            <version>6.6.1.Final</version>
+        </dependency>
+
+        <!-- MySQL JDBC Driver -->
+        <dependency>
+            <groupId>mysql</groupId>
+            <artifactId>mysql-connector-java</artifactId>
+            <version>8.0.33</version>
+        </dependency>
+
+        <!-- JPA API -->
+        <dependency>
+            <groupId>jakarta.persistence</groupId>
+            <artifactId>jakarta.persistence-api</artifactId>
+            <version>3.0.0</version>
+        </dependency>
+
+        <!-- Hibernate Annotations -->
+        <dependency>
+            <groupId>org.hibernate.common</groupId>
+            <artifactId>hibernate-commons-annotations</artifactId>
+            <version>5.1.2.Final</version>
+        </dependency>
     </dependencies>
 </project>
diff --git a/src/main/java/xyz/soukup/mineconomiaCoreV2/MineconomiaCoreV2.java b/src/main/java/xyz/soukup/mineconomiaCoreV2/MineconomiaCoreV2.java
index c77ff03..ad8090a 100644
--- a/src/main/java/xyz/soukup/mineconomiaCoreV2/MineconomiaCoreV2.java
+++ b/src/main/java/xyz/soukup/mineconomiaCoreV2/MineconomiaCoreV2.java
@@ -3,17 +3,23 @@ package xyz.soukup.mineconomiaCoreV2;
 import commands.tabCompleter;
 import org.bukkit.configuration.file.FileConfiguration;
 import org.bukkit.plugin.java.JavaPlugin;
+import xyz.soukup.mineconomiaCoreV2.database.HibernateUtil;
 import xyz.soukup.mineconomiaCoreV2.tractor.giveTractorCommand;
 
 import java.util.Objects;
 
+import static xyz.soukup.mineconomiaCoreV2.core.sharedValues.plugin;
+
 public final class MineconomiaCoreV2 extends JavaPlugin {
-    MineconomiaCoreV2 plugin = getPlugin(this.getClass());
+    private static MineconomiaCoreV2 instance;
+
+
     @Override
     public void onEnable() {
         // Plugin startup logic
+        instance = this;
         getLogger().info("STARTING MINECONOMIA CORE");
-        plugin.saveConfig();
+        plugin.saveDefaultConfig();
 
         // Tractor registration
         Objects.requireNonNull(plugin.getCommand("tractor")).setExecutor(new giveTractorCommand());
@@ -28,6 +34,10 @@ public final class MineconomiaCoreV2 extends JavaPlugin {
     @Override
     public void onDisable() {
         // Plugin shutdown logic
+        HibernateUtil.shutdown();
     }
 
+    public static MineconomiaCoreV2 getInstance() {
+        return instance;
+    }
 }
diff --git a/src/main/java/xyz/soukup/mineconomiaCoreV2/core/sharedValues.java b/src/main/java/xyz/soukup/mineconomiaCoreV2/core/sharedValues.java
index 989729a..3178e29 100644
--- a/src/main/java/xyz/soukup/mineconomiaCoreV2/core/sharedValues.java
+++ b/src/main/java/xyz/soukup/mineconomiaCoreV2/core/sharedValues.java
@@ -1,12 +1,14 @@
 package xyz.soukup.mineconomiaCoreV2.core;
 
+import org.bukkit.Bukkit;
 import org.bukkit.configuration.file.FileConfiguration;
+import org.bukkit.plugin.java.JavaPlugin;
 import xyz.soukup.mineconomiaCoreV2.MineconomiaCoreV2;
 
 import java.util.logging.Logger;
 
 public class sharedValues {
-    public static MineconomiaCoreV2 plugin = MineconomiaCoreV2.getPlugin(MineconomiaCoreV2.class);
+    public static MineconomiaCoreV2 plugin = MineconomiaCoreV2.getInstance();
     public static FileConfiguration config = plugin.getConfig();
     public static Logger logger = plugin.getLogger();
 }
diff --git a/src/main/java/xyz/soukup/mineconomiaCoreV2/database/HibernateUtil.java b/src/main/java/xyz/soukup/mineconomiaCoreV2/database/HibernateUtil.java
new file mode 100644
index 0000000..37c531c
--- /dev/null
+++ b/src/main/java/xyz/soukup/mineconomiaCoreV2/database/HibernateUtil.java
@@ -0,0 +1,113 @@
+package xyz.soukup.mineconomiaCoreV2.database;
+
+import jakarta.persistence.Query;
+import jakarta.persistence.criteria.CriteriaBuilder;
+import jakarta.persistence.criteria.CriteriaQuery;
+import org.bukkit.scoreboard.Criteria;
+import org.hibernate.Session;
+import org.hibernate.SessionFactory;
+import org.hibernate.Transaction;
+import org.hibernate.boot.MetadataSources;
+import org.hibernate.boot.model.internal.QueryBinder;
+import org.hibernate.boot.registry.StandardServiceRegistry;
+import org.hibernate.boot.registry.StandardServiceRegistryBuilder;
+import xyz.soukup.mineconomiaCoreV2.core.sharedValues;
+import xyz.soukup.mineconomiaCoreV2.variables.PlayerData;
+
+import java.util.List;
+import java.util.Objects;
+import java.util.Properties;
+
+import static xyz.soukup.mineconomiaCoreV2.core.sharedValues.config;
+import static xyz.soukup.mineconomiaCoreV2.core.sharedValues.logger;
+
+public class HibernateUtil {
+    private static SessionFactory sessionFactory;
+
+    static {
+
+        try {
+
+            StandardServiceRegistry registry = new StandardServiceRegistryBuilder()
+                    .applySettings(getHibernateProperties())
+                    .build();
+
+            sessionFactory = new MetadataSources(registry)
+                    .addAnnotatedClass(PlayerData.class)
+                    .buildMetadata()
+                    .buildSessionFactory();
+
+        } catch (Exception e) {
+
+            sharedValues.logger.warning(e.toString());
+
+            if (sessionFactory != null) {
+                sessionFactory.close();
+            }
+
+        }
+    }
+
+
+    private static Properties getHibernateProperties() {
+
+        String host = config.getString("database.host");
+        String port = config.getString("database.port");
+        String user = config.getString("database.user");
+        String password = config.getString("database.password");
+        String database = config.getString("database.database");
+
+        String jdbcString = "jdbc:mysql://" + host + ":" + port + "/" + database;
+
+        Properties properties = new Properties();
+        properties.put("hibernate.dialect", "org.hibernate.dialect.MySQLDialect");
+        properties.put("hibernate.connection.driver_class", "com.mysql.cj.jdbc.Driver");
+        properties.put("hibernate.connection.url", jdbcString);
+        properties.put("hibernate.connection.username", user);
+        properties.put("hibernate.connection.password", password);
+        properties.put("hibernate.hbm2ddl.auto", "update");
+        properties.put("hibernate.show_sql", "true");
+        return properties;
+    }
+
+
+    public static SessionFactory getSessionFactory() {
+        return sessionFactory;
+    }
+
+    public static Session newSession(){
+        return getSessionFactory().openSession();
+    }
+
+    public static void shutdown() {
+        if (sessionFactory != null) {
+            sessionFactory.close();
+        }
+    }
+
+
+    public static void saveToDatabase(Object object){
+
+        Session session = HibernateUtil.newSession();
+        Transaction transaction = null;
+
+        try {
+
+            transaction = session.beginTransaction();
+            session.persist(object);
+            transaction.commit();
+            session.close();
+
+        }catch (Exception e){
+
+            if (transaction != null) {
+                transaction.rollback(); // Rollback if something goes wrong
+            }
+
+            logger.warning(e.toString());
+        }
+    }
+
+
+
+}
diff --git a/src/main/java/xyz/soukup/mineconomiaCoreV2/database/PlayerDataDatabase.java b/src/main/java/xyz/soukup/mineconomiaCoreV2/database/PlayerDataDatabase.java
new file mode 100644
index 0000000..8f507f5
--- /dev/null
+++ b/src/main/java/xyz/soukup/mineconomiaCoreV2/database/PlayerDataDatabase.java
@@ -0,0 +1,18 @@
+package xyz.soukup.mineconomiaCoreV2.database;
+
+import jakarta.persistence.criteria.CriteriaBuilder;
+import xyz.soukup.mineconomiaCoreV2.variables.PlayerData;
+
+
+public class PlayerDataDatabase {
+
+    public static void savePlayerDataToDatabase(PlayerData playerData){
+        HibernateUtil.saveToDatabase(playerData);
+    }
+
+    public static PlayerData getPlayerDataFromDatabase(String nickname){
+        CriteriaBuilder criteriaBuilder = HibernateUtil.newSession().getCriteriaBuilder();
+        return null;
+    }
+
+}
diff --git a/src/main/java/xyz/soukup/mineconomiaCoreV2/database/PlayerInit.java b/src/main/java/xyz/soukup/mineconomiaCoreV2/database/PlayerInit.java
new file mode 100644
index 0000000..3232d21
--- /dev/null
+++ b/src/main/java/xyz/soukup/mineconomiaCoreV2/database/PlayerInit.java
@@ -0,0 +1,5 @@
+package xyz.soukup.mineconomiaCoreV2.database;
+
+public class PlayerInit {
+    public static void onJoin(){}
+}
diff --git a/src/main/java/xyz/soukup/mineconomiaCoreV2/core/MsgRetriever.java b/src/main/java/xyz/soukup/mineconomiaCoreV2/tools/LangManager.java
similarity index 80%
rename from src/main/java/xyz/soukup/mineconomiaCoreV2/core/MsgRetriever.java
rename to src/main/java/xyz/soukup/mineconomiaCoreV2/tools/LangManager.java
index b0c20f4..4375fb6 100644
--- a/src/main/java/xyz/soukup/mineconomiaCoreV2/core/MsgRetriever.java
+++ b/src/main/java/xyz/soukup/mineconomiaCoreV2/tools/LangManager.java
@@ -1,13 +1,14 @@
-package xyz.soukup.mineconomiaCoreV2.core;
+package xyz.soukup.mineconomiaCoreV2.tools;
 
 import org.bukkit.configuration.file.YamlConfiguration;
 
 import static xyz.soukup.mineconomiaCoreV2.core.sharedValues.config;
 import static xyz.soukup.mineconomiaCoreV2.core.sharedValues.plugin;
 
-public class MsgRetriever {
+public class LangManager {
+
     public static YamlConfiguration lang = null;
-    public static void loadLang(){
+    public static void  loadLang(){
         String langPath = "lang/" + config.getString("lang");
         plugin.saveResource(langPath, false);
         //lang = YamlConfiguration.loadConfiguration(plugin.getResource(langPath));
diff --git a/src/main/java/xyz/soukup/mineconomiaCoreV2/core/PDC.java b/src/main/java/xyz/soukup/mineconomiaCoreV2/tools/PDC.java
similarity index 83%
rename from src/main/java/xyz/soukup/mineconomiaCoreV2/core/PDC.java
rename to src/main/java/xyz/soukup/mineconomiaCoreV2/tools/PDC.java
index bf5f637..9ba160e 100644
--- a/src/main/java/xyz/soukup/mineconomiaCoreV2/core/PDC.java
+++ b/src/main/java/xyz/soukup/mineconomiaCoreV2/tools/PDC.java
@@ -1,4 +1,4 @@
-package xyz.soukup.mineconomiaCoreV2.core;
+package xyz.soukup.mineconomiaCoreV2.tools;
 
 import org.bukkit.NamespacedKey;
 import org.bukkit.block.TileState;
@@ -6,42 +6,58 @@ import org.bukkit.entity.Player;
 import org.bukkit.inventory.meta.ItemMeta;
 import org.bukkit.persistence.PersistentDataContainer;
 import org.bukkit.persistence.PersistentDataType;
+import xyz.soukup.mineconomiaCoreV2.core.sharedValues;
 
+//funkce pro lehčí manipulaci s minecraft PDC (trvalé uchovávání dat v entitách, itemech a blocích)
 public class PDC {
+
+    //Zapíše hodnotu do hráče
     public static void WritePlayerPDC(Player player, String key, PersistentDataType type, Object value){
         NamespacedKey nKey = new NamespacedKey(sharedValues.plugin, key);
         PersistentDataContainer pdc = player.getPersistentDataContainer();
         pdc.set(nKey, type, value);
 
     }
+
+    //Vezme hodnotu z hráče
     public static Object GetPlayerPDC(Player player, String key, PersistentDataType type){
         NamespacedKey nKey = new NamespacedKey(sharedValues.plugin, key);
         PersistentDataContainer pdc = player.getPersistentDataContainer();
         return pdc.get(nKey, type);
     }
+
+    //Odstraní hodnotu z hráče
     public static void DeletePlayerPDC(Player player, String key){
         NamespacedKey nKey = new NamespacedKey(sharedValues.plugin, key);
         PersistentDataContainer pdc = player.getPersistentDataContainer();
         pdc.remove(nKey);
 
     }
+
+    //Zapíše hodnotu do itemu
     public static void WriteItemMetaPDC(ItemMeta itemMeta, String key, PersistentDataType type, Object value){
         NamespacedKey nKey = new NamespacedKey(sharedValues.plugin, key);
         PersistentDataContainer pdc = itemMeta.getPersistentDataContainer();
         pdc.set(nKey, type, value);
 
     }
+
+    //Odstraní hodnotu z itemu
     public static Object GetItemMetaPDC(ItemMeta itemMeta, String key, PersistentDataType type){
         NamespacedKey nKey = new NamespacedKey(sharedValues.plugin, key);
         PersistentDataContainer pdc = itemMeta.getPersistentDataContainer();
         return pdc.get(nKey, type);
     }
+
+    //Zapíše hodnotu do statusu bloku
     public static void WriteTileStatePDC(TileState tileState, String key, PersistentDataType type, Object value){
         NamespacedKey nKey = new NamespacedKey(sharedValues.plugin, key);
         PersistentDataContainer pdc = tileState.getPersistentDataContainer();
         pdc.set(nKey, type, value);
 
     }
+
+    //Vezme hodnotu ze statusu bloku
     public static Object GetTileStatePDC(TileState tileState, String key, PersistentDataType type){
         NamespacedKey nKey = new NamespacedKey(sharedValues.plugin, key);
         PersistentDataContainer pdc = tileState.getPersistentDataContainer();
diff --git a/src/main/java/xyz/soukup/mineconomiaCoreV2/tools/inventoryTools.java b/src/main/java/xyz/soukup/mineconomiaCoreV2/tools/inventoryTools.java
new file mode 100644
index 0000000..aeee557
--- /dev/null
+++ b/src/main/java/xyz/soukup/mineconomiaCoreV2/tools/inventoryTools.java
@@ -0,0 +1,30 @@
+package xyz.soukup.mineconomiaCoreV2.tools;
+
+import org.bukkit.inventory.Inventory;
+import org.bukkit.inventory.ItemStack;
+
+public class inventoryTools {
+
+    // Funkce pro zjištění kolikrát je daný item v inventory. Vrátí int
+    public static int getItemCount(Inventory inventory, ItemStack itemStack) {
+
+        int count = 0;
+        int invLength = inventory.getSize();
+        int i = 0;
+
+        while (i < invLength) {
+
+            ItemStack currentItem = inventory.getItem(i);
+
+            if (!currentItem.isSimilar(itemStack)) {
+                continue;
+            }
+
+            count += currentItem.getAmount();
+
+            i++;
+        }
+
+        return count;
+    }
+}
diff --git a/src/main/java/xyz/soukup/mineconomiaCoreV2/variables/PlayerData.java b/src/main/java/xyz/soukup/mineconomiaCoreV2/variables/PlayerData.java
new file mode 100644
index 0000000..5d80eb3
--- /dev/null
+++ b/src/main/java/xyz/soukup/mineconomiaCoreV2/variables/PlayerData.java
@@ -0,0 +1,61 @@
+package xyz.soukup.mineconomiaCoreV2.variables;
+
+import jakarta.persistence.Entity;
+import jakarta.persistence.GeneratedValue;
+import jakarta.persistence.GenerationType;
+import jakarta.persistence.Id;
+
+//Definování Member classy pro databázi a další manipulace
+
+@Entity
+public class PlayerData {
+
+    @Id
+    @GeneratedValue(strategy = GenerationType.IDENTITY)
+    private int id;
+
+    private String nickname;
+    private String uuid;
+    private int online;
+    private float money;
+
+    public int getId() {
+        return id;
+    }
+
+    public void setId(int id) {
+        this.id = id;
+    }
+
+    public String getNickname() {
+        return nickname;
+    }
+
+    public void setNickname(String nickname) {
+        this.nickname = nickname;
+    }
+
+    public String getUuid() {
+        return uuid;
+    }
+
+    public void setUuid(String uuid) {
+        this.uuid = uuid;
+    }
+
+    public int getOnline() {
+        return online;
+    }
+
+    public void setOnline(int online) {
+        this.online = online;
+    }
+
+    public float getMoney() {
+        return money;
+    }
+
+    public void setMoney(float money) {
+        this.money = money;
+    }
+}
diff --git a/src/main/resources/config.yml b/src/main/resources/config.yml
index 46ccd95..5aa99c5 100644
--- a/src/main/resources/config.yml
+++ b/src/main/resources/config.yml
@@ -1,2 +1,8 @@
 version: 1.0
-language: "czech.yml"
\ No newline at end of file
+language: "czech.yml"
+database:
+  host: localhost
+  port: 3306
+  user: mcore
+  password: mcore
+  database: mcore
\ No newline at end of file