Erro: close() was never explicitly called on database

Pessoal, que pode ser isso?

10-11 18:24:00.556: E/Database(278): close() was never explicitly called on database '/data/data/com.br.aquavendas/databases/aqua.db'
10-11 18:24:00.556: E/Database(278): android.database.sqlite.DatabaseObjectNotClosedException: Application did not close the cursor or database object that was opened here
10-11 18:24:00.556: E/Database(278): at android.database.sqlite.SQLiteDatabase.<init>(SQLiteDatabase.java:1810)
10-11 18:24:00.556: E/Database(278): at android.database.sqlite.SQLiteDatabase.openDatabase(SQLiteDatabase.java:817)
10-11 18:24:00.556: E/Database(278): at android.database.sqlite.SQLiteDatabase.openOrCreateDatabase(SQLiteDatabase.java:851)
10-11 18:24:00.556: E/Database(278): at android.database.sqlite.SQLiteDatabase.openOrCreateDatabase(SQLiteDatabase.java:844)
10-11 18:24:00.556: E/Database(278): at android.app.ContextImpl.openOrCreateDatabase(ContextImpl.java:540)
10-11 18:24:00.556: E/Database(278): at android.database.sqlite.SQLiteOpenHelper.getWritableDatabase(SQLiteOpenHelper.java:98)
10-11 18:24:00.556: E/Database(278): at com.br.aquavendas.banco.DB.getDatabase(DB.java:35)
10-11 18:24:00.556: E/Database(278): at com.br.aquavendas.dao.ClienteDAO.<init>(ClienteDAO.java:25)
10-11 18:24:00.556: E/Database(278): at com.br.aquavendas.EditarClientes.onCreate(EditarClientes.java:39)
10-11 18:24:00.556: E/Database(278): at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1047)
10-11 18:24:00.556: E/Database(278): at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2627)
10-11 18:24:00.556: E/Database(278): at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2679)
10-11 18:24:00.556: E/Database(278): at android.app.ActivityThread.access$2300(ActivityThread.java:125)
10-11 18:24:00.556: E/Database(278): at android.app.ActivityThread$H.handleMessage(ActivityThread.java:2033)
10-11 18:24:00.556: E/Database(278): at android.os.Handler.dispatchMessage(Handler.java:99)
10-11 18:24:00.556: E/Database(278): at android.os.Looper.loop(Looper.java:123)
10-11 18:24:00.556: E/Database(278): at android.app.ActivityThread.main(ActivityThread.java:4627)
10-11 18:24:00.556: E/Database(278): at java.lang.reflect.Method.invokeNative(Native Method)
10-11 18:24:00.556: E/Database(278): at java.lang.reflect.Method.invoke(Method.java:521)
10-11 18:24:00.556: E/Database(278): at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:868)
10-11 18:24:00.556: E/Database(278): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:626)
10-11 18:24:00.556: E/Database(278): at dalvik.system.NativeStart.main(Native Method)