minor changes resolved

app/src/main/java/org/apache/fineract/data/remote/NullOnEmptyConverterFactory.java

@@ -0,0 +1,26 @@
+package org.apache.fineract.data.remote;
+
+import java.io.IOException;
+import java.lang.annotation.Annotation;
+import java.lang.reflect.Type;
+
+import okhttp3.ResponseBody;
+import retrofit2.Converter;
+import retrofit2.Retrofit;
+
+public class NullOnEmptyConverterFactory extends Converter.Factory {
+
+    @Override
+    public Converter<ResponseBody, ?> responseBodyConverter(Type type, Annotation[] annotations,
+            Retrofit retrofit) {
+        final Converter<ResponseBody, ?> delegate = retrofit.nextResponseBodyConverter(this, type,
+                annotations);
+        return new Converter<ResponseBody, Object>() {
+            @Override
+            public Object convert(ResponseBody body) throws IOException {
+                if (body.contentLength() == 0) return null;
+                return delegate.convert(body);
+            }
+        };
+    }
+}