diff --git a/app/src/main/java/info/nerull7/mysqlbrowser/LoginFragment.java b/app/src/main/java/info/nerull7/mysqlbrowser/LoginFragment.java
index 4cb58b4..4f67105 100644
--- a/app/src/main/java/info/nerull7/mysqlbrowser/LoginFragment.java
+++ b/app/src/main/java/info/nerull7/mysqlbrowser/LoginFragment.java
@@ -3,23 +3,28 @@ package info.nerull7.mysqlbrowser;
 import android.animation.Animator;
 import android.animation.AnimatorListenerAdapter;
 import android.animation.ValueAnimator;
+import android.app.AlertDialog;
 import android.app.Fragment;
+import android.content.DialogInterface;
 import android.content.Intent;
 import android.net.Uri;
 import android.os.Bundle;
+import android.util.Log;
 import android.view.LayoutInflater;
 import android.view.View;
 import android.view.ViewGroup;
 import android.widget.Button;
 import android.widget.EditText;
 
+import info.nerull7.mysqlbrowser.db.DatabaseConnector;
+
 /**
  * Created by nerull7 on 07.07.14.
  */
 public class LoginFragment extends Fragment implements View.OnClickListener {
-    EditText uri;
-    EditText login;
-    EditText password; // TODO: Mega super epic security (RSA/AES maybe?)
+    EditText urlTextbox;
+    EditText loginTextbox;
+    EditText passwordTextbox; // TODO: Mega super epic security (RSA/AES maybe?)
 
     public LoginFragment(){
 
@@ -31,24 +36,42 @@ public class LoginFragment extends Fragment implements View.OnClickListener {
         View rootView = inflater.inflate(R.layout.fragment_login, container, false);
         rootView.findViewById(R.id.buttonLogin).setOnClickListener(this);
 
-        this.uri = (EditText) rootView.findViewById(R.id.editURL);
-        this.login = (EditText) rootView.findViewById(R.id.editLogin);
-        this.password = (EditText) rootView.findViewById(R.id.editPassowrd);
+        this.urlTextbox = (EditText) rootView.findViewById(R.id.editURL);
+        this.loginTextbox = (EditText) rootView.findViewById(R.id.editLogin);
+        this.passwordTextbox = (EditText) rootView.findViewById(R.id.editPassowrd);
 
         return rootView;
     }
 
     @Override
     public void onClick(View view) {
-//        DatabaseFragment databaseFragment = DatabaseFragment.newInstance(login.getText().toString(),
-//                password.getText().toString(),
-//                uri.getText().toString());
-//
-//        getFragmentManager().beginTransaction()
-//                .add(R.id.container, databaseFragment)
-//                .remove(this)
-//                .commit();
-        Intent intent = new Intent(getActivity(), DatabaseActivity.class);
-        startActivity(intent);
+        checkLogin();
+    }
+
+    private void checkLogin(){
+        String login, password, url;
+        login = loginTextbox.getText().toString();
+        password = passwordTextbox.getText().toString();
+        url = urlTextbox.getText().toString();
+        if(DatabaseConnector.checkLogin(login, password, url)) {
+            Static.databaseConnector = new DatabaseConnector(login, password, url);
+            Intent intent = new Intent(getActivity(), DatabaseActivity.class);
+            startActivity(intent);
+        }
+        else {
+            final AlertDialog.Builder builder = new AlertDialog.Builder(getActivity());
+            builder.setMessage(DatabaseConnector.errorMsg);
+            builder.setNeutralButton(R.string.ok, new DialogInterface.OnClickListener() {
+                        @Override
+                        public void onClick(DialogInterface dialogInterface, int i) {
+                            // Nothing to do here
+                            // Cleaning inputs is stupid
+                        }
+                    });
+            builder.setTitle(R.string.error);
+            builder.setIcon(R.drawable.ic_action_warning);
+            builder.create();
+            builder.show();
+        }
     }
 }
diff --git a/app/src/main/java/info/nerull7/mysqlbrowser/Static.java b/app/src/main/java/info/nerull7/mysqlbrowser/Static.java
new file mode 100644
index 0000000..fd10211
--- /dev/null
+++ b/app/src/main/java/info/nerull7/mysqlbrowser/Static.java
@@ -0,0 +1,16 @@
+package info.nerull7.mysqlbrowser;
+
+import info.nerull7.mysqlbrowser.db.DatabaseConnector;
+
+/**
+ * Created by nerull7 on 14.07.14.
+ */
+public class Static {
+    public static DatabaseConnector databaseConnector = null;
+
+    public static boolean isDatabaseConnectorActive(){
+        if (databaseConnector==null)
+            return false;
+        return true;
+    }
+}
diff --git a/app/src/main/java/info/nerull7/mysqlbrowser/db/DatabaseConnector.java b/app/src/main/java/info/nerull7/mysqlbrowser/db/DatabaseConnector.java
index 73016e6..0193679 100644
--- a/app/src/main/java/info/nerull7/mysqlbrowser/db/DatabaseConnector.java
+++ b/app/src/main/java/info/nerull7/mysqlbrowser/db/DatabaseConnector.java
@@ -15,12 +15,25 @@ public class DatabaseConnector {
     private String database;
     private String table;
 
+    public static String errorMsg;
+
     public DatabaseConnector(String login, String password, String url){
         this.login = login;
         this.password = password;
         this.url = url;
     }
 
+    // TODO Real checking
+    public static boolean checkLogin(String login, String password, String url){
+        if (login.compareTo("nerull7")==0)
+            return true;
+        if(password==null)
+            errorMsg = "No Password";
+        else
+            errorMsg = "I don't know";
+        return false;
+    }
+
     public void setDatabaseInUse(String database){
         this.database = database;
     }
diff --git a/app/src/main/res/drawable-hdpi/ic_action_warning.png b/app/src/main/res/drawable-hdpi/ic_action_warning.png
new file mode 100644
index 0000000..47cdc39
Binary files /dev/null and b/app/src/main/res/drawable-hdpi/ic_action_warning.png differ
diff --git a/app/src/main/res/drawable-mdpi/ic_action_warning.png b/app/src/main/res/drawable-mdpi/ic_action_warning.png
new file mode 100644
index 0000000..a4bd2cc
Binary files /dev/null and b/app/src/main/res/drawable-mdpi/ic_action_warning.png differ
diff --git a/app/src/main/res/values/strings.xml b/app/src/main/res/values/strings.xml
index da3499a..6831380 100644
--- a/app/src/main/res/values/strings.xml
+++ b/app/src/main/res/values/strings.xml
@@ -10,5 +10,8 @@
     <string name="title_activity_main">MainActivity</string>
     <string name="title_activity_database">DatabaseActivity</string>
     <string name="hello_world">Hello world!</string>
+    <string name="login_error">Wrong login/password</string>
+    <string name="ok">OK</string>
+    <string name="error">Error</string>
 
 </resources>