Don't let Java choose when cleaning SmsBuffer, do it ourself

src/main/java/fr/unix_experience/owncloud_sms/engine/ASyncSMSSync.java

@@ -60,6 +60,7 @@ public interface ASyncSMSSync {
 				}
 			}
             OCSMSNotificationUI.cancel(_context);
+			_smsBuffer.clear();
             Log.i(ASyncSMSSync.TAG, "Stopping background sync");
 			return null;
 		}

src/main/java/fr/unix_experience/owncloud_sms/engine/OCSMSOwnCloudClient.java

@@ -175,6 +175,7 @@ public class OCSMSOwnCloudClient {
 		}
 
 		doHttpRequest(post);
+
 		if (_jsonQueryBuffer == null) {
 			Log.e(OCSMSOwnCloudClient.TAG,"Request failed. It doesn't return a valid JSON Object");
 			throw new OCSyncException(R.string.err_sync_push_request, OCSyncErrorType.IO);

src/main/java/fr/unix_experience/owncloud_sms/jni/SmsBuffer.java

@@ -24,13 +24,14 @@ public class SmsBuffer {
 
 	private long mHandle;
 
+	String TAG = SmsBuffer.class.getSimpleName();
+
 	public SmsBuffer() {
 		mHandle = SmsBuffer.createNativeObject();
 	}
 
 	protected void finalize() throws Throwable {
-		SmsBuffer.deleteNativeObject(mHandle);
-		mHandle = 0;
+		clear();
 		super.finalize();
 	}
 
@@ -45,9 +46,21 @@ public class SmsBuffer {
 
 	public void push(int id, int mbid, int type, long date, String address, String body,
 					 String read, String seen) {
+		if (mHandle == 0) {
+			throw new IllegalAccessError("Pushing data to empty native handler, aborting");
+		}
 		SmsBuffer.push(mHandle, id, mbid, type, date, address, body, read, seen);
 	}
 
+	public void clear() {
+		if (mHandle == 0) {
+			return;
+		}
+
+		SmsBuffer.deleteNativeObject(mHandle);
+		mHandle = 0;
+	}
+
 	/*
 	JNI: Eepty method
 	 */