Sketch of connection refusing system

src/main/java/net/kuraczyk/banhammer/BanHammer.java

@@ -0,0 +1,61 @@
+package net.kuraczyk.banhammer;
+
+import net.kuraczyk.banhammer.events.PlayerPreLogin;
+import org.bukkit.ChatColor;
+import org.bukkit.configuration.file.FileConfiguration;
+import org.bukkit.plugin.java.JavaPlugin;
+
+import net.kuraczyk.banhammer.utils.*;
+
+public final class BanHammer extends JavaPlugin {
+
+    public FileConfiguration config;
+    public DBManager db;
+
+    @Override
+    public void onEnable() {
+        saveDefaultConfig();
+        config = getConfig();
+
+        try {
+            Class.forName("net.kuraczyk.libs.postgresql.Driver");
+        } catch (ClassNotFoundException e) {
+            throw new RuntimeException(e);
+        }
+        db = new DBManager(
+                config.getString("database.host"),
+                config.getInt("database.port"),
+                config.getString("database.user"),
+                config.getString("database.pass"),
+                config.getString("database.database"),
+                this.getClassLoader()
+        );
+        String error = db.connect();
+        if(error != null){
+            getLogger().severe(
+                    "Failed to connect to DB!!!!\n"
+                    +error
+                    );
+            getServer().getPluginManager().disablePlugin(this);
+        }
+
+        getLogger().info(ChatColor.translateAlternateColorCodes('&', "&a&b+&r&8 | &aBan&7Hammer"));
+
+        getServer().getPluginManager().registerEvents(new PlayerPreLogin(this), this);
+    }
+
+    @Override
+    public void onDisable() {
+        if(db != null){
+            String error = db.disconnect();
+            if(error != null) {
+                getLogger().severe(
+                        "Error occured while disconnecting from from DB!!!!\n"
+                                +error
+                );
+            }
+        }
+
+        getLogger().info(ChatColor.translateAlternateColorCodes('&', "&c&b-&r&8 | &aBan&7Hammer"));
+    }
+}