Move MapleArrowFetcher to the main module

src/main/java/tools/mapletools/SimpleDatabaseConnection.java

@@ -0,0 +1,30 @@
+package tools.mapletools;
+
+import org.apache.logging.log4j.Level;
+import org.apache.logging.log4j.LogManager;
+import org.apache.logging.log4j.core.config.Configurator;
+import tools.DatabaseConnection;
+
+import java.sql.Connection;
+import java.sql.SQLException;
+
+final class SimpleDatabaseConnection {
+    private SimpleDatabaseConnection() {}
+
+    static Connection getConnection() {
+        muffleLogging();
+        DatabaseConnection.initializeConnectionPool();
+
+        try {
+            return DatabaseConnection.getConnection();
+        } catch (SQLException e) {
+            throw new IllegalStateException("Failed to get database connection", e);
+        }
+    }
+
+    private static void muffleLogging() {
+        final Level minimumVisibleLevel = Level.WARN;
+        Configurator.setLevel(LogManager.getLogger(com.zaxxer.hikari.HikariDataSource.class).getName(), minimumVisibleLevel);
+        Configurator.setRootLevel(minimumVisibleLevel);
+    }
+}