Why does my getWritableDataBase return null values?

I am having an issue with my sqlLite database. Here is my code: DatabaseAdapter.java

package autonote.six.padc.autonote;

import android.content.ContentValues;
import android.content.Context;
import android.database.Cursor;
import android.database.sqlite.SQLiteDatabase;
import android.database.sqlite.SQLiteOpenHelper;
import android.util.Log;

import java.sql.SQLException;

/**
 * Created by Ethan on 1/25/2015.
 */
public class DatabaseAdapter {
    DatabaseHelper helper;

    public DatabaseAdapter(Context context){
        helper = new DatabaseHelper(context);
    }
    public long insertData(String cName, String cTEXT){
        SQLiteDatabase  db= helper.getWritableDatabase();
        ContentValues contentValues = new ContentValues();
        contentValues.put(DatabaseHelper.NAME, cName);
        contentValues.put(DatabaseHelper.TEXT,cTEXT );
        long id=db.insert(DatabaseHelper.TABLE_NAME,null,contentValues);
        return id;

    }
    public String getAllData(){
        SQLiteDatabase db= helper.getWritableDatabase();
        String[] columns = {DatabaseHelper.UID, DatabaseHelper.NAME, DatabaseHelper.TEXT};
        Cursor cursor=db.query(DatabaseHelper.TABLE_NAME, columns, null, null, null, null, null);
        StringBuffer buffer = new StringBuffer();
        while(cursor.moveToNext()){
            int cid=cursor.getInt(0);
            String  name = cursor.getString(1);
            String text = cursor.getString(2);
            buffer.append(cid + " " + name + " " + text + "<br>");


        }
        return buffer.toString();
    }

    class DatabaseHelper extends SQLiteOpenHelper {
        public static final String DATABASE_NAME = "DataBase";
        public static final String TABLE_NAME = "DATABASE_TABLE";
        public static final String UID = "_id";
        public static final String NAME = "Name";
        public static final int DATABASE_VERSION = 5;
        public static final String TEXT = "TEXT";

        public static final String CREATE_TABLE = "CREATE TABLE " + TABLE_NAME + " (" + UID + " INTEGER PRIMARY KEY AUTOINCREMENT, " + NAME + " VARCHAR(30),"+TEXT+" VARCHAR(999999));";
        public static final String DROP_TABLE = "DROP TABLE IF EXISTS " +TABLE_NAME;

        public DatabaseHelper(Context context) {
            super(context, DATABASE_NAME, null, DATABASE_VERSION);
        }

        @Override
        public void onCreate(SQLiteDatabase db) {
            db.execSQL(CREATE_TABLE);
            Log.i("Table Created", "Table Created");


        }

        @Override
        public void onUpgrade(SQLiteDatabase db, int oldVersion, int newVersion) {

            db.execSQL(DROP_TABLE);
            onCreate(db);
            Log.i("Table Upgraded", "Table Upgraded");

        }

    }

}

And here is my Load_Text.java

package autonote.six.padc.autotext
import android.os.Bundle;
import android.support.v7.app.ActionBarActivity;
import android.text.Html;
import android.widget.TextView;
import android.widget.Toast;
import java.util.Arrays;


/**
 * Created by Ethan on 1/26/2015.
 */
 public class Load_Text extends ActionBarActivity {
    TextView dataText;
    String data;
    DatabaseAdapter databaseHelper;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.load_text);
        databaseHelper = new DatabaseAdapter(this);
        dataText=(TextView)findViewById(R.id.textView3);
        data = databaseHelper.getAllData();

        if(databaseHelper.getAllData() == null){
            Toast.makeText(this, "No data found", Toast.LENGTH_LONG).show();
        }else{
            dataText.setText(Html.fromHtml((data)));
        }

    }


}

The issue I am having here is when onCreate is called the values returned for .getAllData do not return correctly. They return like this:

1 null null
2 null null

This obviously means that name and text are returning null, but, being the newbie to SQLite that I am, I am not quite sure why. Any ideas?

Thanks!