NullPointerException when calling a method from a different class

I'm trying to get a simple note-taking app to work, but I keep on getting a nullPointerException when calling a certain method.

The value from the textEdit in the dialog layout is retrieved just fine. I checked by logging the results. The problem occurs when I try to run the createNotes(content) method.

public class Dialog extends Activity {
NotesBean notesBean = null;
public NotesDao datasource;
@Override
public void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    Log.e("log", "Running NotiMgr");
    setContentView(R.layout.dialog);
    RelativeLayout layout = (RelativeLayout) findViewById(R.id.dialog_background);  
    layout.setOnClickListener( new View.OnClickListener() {
        @Override
        public void onClick(View v) {
        EditText mEdit = (EditText) v.findViewById(R.id.editText);
        String content = mEdit.getText().toString();
        Log.v("EditText", content);

        //THIS IS WHERE THE ERROR OCCURS
        datasource.createNotes(content);
        finish();
        }
    });
}

This class deals with inserts, deletes and db related stuff. I've tried debugging, but it never reaches this class.

public class NotesDao {
public NotesBean createNotes(String content) {
    try {
        Log.v("createNotes", content);
        ContentValues values = new ContentValues();
        values.put(DbHelper.COLUMN_CONTENT, content);
        long insertSeq = database.insert(DbHelper.TABLE_NOTES, null, values);
        Cursor cursor = database.query(
                DbHelper.TABLE_NOTES,                       //String table
                allColumns,                                 //String[] columns
                DbHelper.COLUMN_SEQ + " = " + insertSeq,        //String selection
                null,                                       //String[] selectionArgs
                null,                                       //String groupBy
                null,                                       //String having
                null);                                      //String orderBy
        cursor.moveToFirst();
        NotesBean newNotes = cursorToNotes(cursor);
        cursor.close();
        return newNotes;
    } catch (Exception e) {
          throw new RuntimeException(e);
    }
}

btw I have also confirmed that the db is opened through logcat... But it was in a different activity. Does that mean I should close it and open it again in this activity?

Any help would be greatly appreciated! Thanks!