Sqlite Database not inserted Using Script in Proguard Build

I have to display some data from database even after un-install the app. For that I am writing script for that insert operations. And at Re-installation I am executing that script saved on sdcard with db.execSQL(toExec); statement. Using following code snipt

//write code to execute script from file 
                        SQLiteDatabase db = helper.getWritableDatabase();
                        BufferedReader reader = null;
                        try {
                            reader = new BufferedReader(new FileReader(Constants.DIR_PATH+"/"+Constants.SCRIPT_FILE_NAME));
                            String line;
                            while((line = reader.readLine())!=null)
                            {
                                line.trim();
                                AppLog.d(TAG, "Execute script with line: "+line);
                                try
                                {
                                    db.execSQL(line);
                                }
                                catch(SQLiteException e)
                                {
                                    AppLog.d(TAG, "Sqlite Excp with Line: "+line+e);
                                }
                            }
                        } catch (FileNotFoundException e1) {
                            // TODO Auto-generated catch block
                            AppLog.d(TAG, "File Not Found to execute Script"+e1);
                        }
                        catch (IOException e) {
                            // TODO Auto-generated catch block
                            e.printStackTrace();
                        }

This works fine in normal build. But insertion is not done in Proguard build. Also note that for Database operations I am using ORMLite. And at the time of executing script database is already created

I have added following properties in proguard-project.txt

-keep class com.j256.**
-keepclassmembers class com.j256.** {
            *;
      }
-keep public class android.database.sqlite.**

I can not figure out what is happening.

Please help...

I found that DB classes and other fields are being renamed by Proguard. As @jim commented. So I added following configuration statements in proguard-project.txt file to resolved issue

-keep class com.db.models.**
-keepclassmembers class com.db.models.** { *; }  

where com.db.models is a package name where your database entity classes are saved.