Initial RS-ServerAdmnin commit

src/main/java/com/rsscripting/serveradmin/database/DatabaseManager.java

@@ -0,0 +1,97 @@
+package com.rsscripting.serveradmin.database;
+
+import com.rsscripting.serveradmin.RSServerAdmin;
+
+import java.io.File;
+import java.sql.Connection;
+import java.sql.DriverManager;
+import java.sql.SQLException;
+import java.sql.Statement;
+
+public class DatabaseManager {
+
+    private final RSServerAdmin plugin;
+    private Connection connection;
+
+    public DatabaseManager(RSServerAdmin plugin) {
+        this.plugin = plugin;
+    }
+
+    public void connect() throws SQLException {
+
+        File dataFolder = plugin.getDataFolder();
+
+        if (!dataFolder.exists()) {
+            dataFolder.mkdirs();
+        }
+
+        File databaseFile = new File(
+                dataFolder,
+                plugin.getConfig().getString(
+                        "database.file",
+                        "serveradmin.db"
+                )
+        );
+
+        connection = DriverManager.getConnection(
+                "jdbc:sqlite:" + databaseFile.getAbsolutePath()
+        );
+
+        createTables();
+    }
+
+    private void createTables() throws SQLException {
+
+        try (Statement statement = connection.createStatement()) {
+
+            statement.execute("""
+                    CREATE TABLE IF NOT EXISTS settings (
+                        world_name TEXT NOT NULL,
+                        setting_key TEXT NOT NULL,
+                        value INTEGER NOT NULL,
+                        PRIMARY KEY(world_name, setting_key)
+                    )
+                    """);
+
+            statement.execute("""
+            CREATE TABLE IF NOT EXISTS worlds (
+            world_name TEXT PRIMARY KEY
+            )
+            """);
+
+            statement.execute("""
+                    CREATE TABLE IF NOT EXISTS defaults (
+                        setting_key TEXT PRIMARY KEY,
+                        value INTEGER NOT NULL
+                    )
+                    """);
+
+            statement.execute(
+                    """
+                    CREATE TABLE IF NOT EXISTS keep_inventory
+                    (
+                        world_name TEXT PRIMARY KEY,
+                        enabled INTEGER NOT NULL
+                    )
+                    """
+            );
+
+        }
+    }
+
+    public Connection getConnection() {
+        return connection;
+    }
+
+    public void disconnect() {
+
+        if (connection == null) {
+            return;
+        }
+
+        try {
+            connection.close();
+        } catch (SQLException ignored) {
+        }
+    }
+}