diff --git a/src/core/feeddownloader.cpp b/src/core/feeddownloader.cpp
index 121119fe2..54a4460a0 100644
--- a/src/core/feeddownloader.cpp
+++ b/src/core/feeddownloader.cpp
@@ -1,5 +1,19 @@
 #include "core/feeddownloader.h"
 
+#include "core/feedsmodelfeed.h"
+
+#include <QThread>
+#include <QDebug>
+
 
 FeedDownloader::FeedDownloader(QObject *parent) : QObject(parent) {
 }
+
+FeedDownloader::~FeedDownloader() {
+  qDebug("Destroying FeedDownloader instance.");
+}
+
+void FeedDownloader::updateFeeds(const QList<FeedsModelFeed *> &feeds) {
+  qDebug().nospace() << "Creating main application form in thread: \'" <<
+                        QThread::currentThreadId() << "\'.";
+}
diff --git a/src/core/feeddownloader.h b/src/core/feeddownloader.h
index 7466f6b29..be225198a 100644
--- a/src/core/feeddownloader.h
+++ b/src/core/feeddownloader.h
@@ -4,16 +4,34 @@
 #include <QObject>
 
 
+class FeedsModelFeed;
+
+// This class offers means to "update" feeds
+// and "special" categories.
+// NOTE: This class is used withing separate thread.
 class FeedDownloader : public QObject {
     Q_OBJECT
 
   public:
+    // Constructors and destructors.
     explicit FeedDownloader(QObject *parent = 0);
+    virtual ~FeedDownloader();
 
   signals:
+    // Emitted if all items from update queue are
+    // processed.
+    void finished();
+
+    // Emitted if any item is processed.
+    // "Current" counts
+    void progress(FeedsModelFeed *feed, int current, int total);
 
   public slots:
-
+    // Performs update of all feeds from the "feeds" parameter.
+    // New messages are downloaded for each feed and they
+    // are stored persistently in the database.
+    // Appropriate signals are emitted.
+    void updateFeeds(const QList<FeedsModelFeed*> &feeds);
 };
 
 #endif // FEEDDOWNLOADER_H
diff --git a/src/core/feedsmodel.cpp b/src/core/feedsmodel.cpp
index 3b207321b..53ad3961e 100644
--- a/src/core/feedsmodel.cpp
+++ b/src/core/feedsmodel.cpp
@@ -17,6 +17,8 @@ FeedsModel::FeedsModel(QObject *parent) : QAbstractItemModel(parent) {
   setObjectName("FeedsModel");
 
   m_rootItem = new FeedsModelRootItem();
+  m_rootItem->setTitle(tr("root"));
+
   m_countsIcon = IconThemeFactory::getInstance()->fromTheme("mail-mark-unread");
 
   m_headerData << tr("Title");
diff --git a/src/core/feedsmodel.h b/src/core/feedsmodel.h
index 35d98a922..1e333ad38 100644
--- a/src/core/feedsmodel.h
+++ b/src/core/feedsmodel.h
@@ -46,6 +46,8 @@ class FeedsModel : public QAbstractItemModel {
     QList<FeedsModelFeed*> feedsForIndex(const QModelIndex &index);
 
   public slots:
+    // Signals that properties (probably counts)
+    // of ALL items have changed.
     void reloadWholeLayout();
 
     // Signals that SOME data of this model need
diff --git a/src/core/feedsmodelrootitem.cpp b/src/core/feedsmodelrootitem.cpp
index 50a8fea65..eec840651 100755
--- a/src/core/feedsmodelrootitem.cpp
+++ b/src/core/feedsmodelrootitem.cpp
@@ -6,7 +6,8 @@
 
 
 FeedsModelRootItem::FeedsModelRootItem(FeedsModelRootItem *parent_item)
-  : m_kind(FeedsModelRootItem::RootItem), m_parentItem(parent_item) {
+  : m_kind(FeedsModelRootItem::RootItem),
+    m_parentItem(parent_item) {
 }
 
 FeedsModelRootItem::~FeedsModelRootItem() {
diff --git a/src/gui/feedmessageviewer.cpp b/src/gui/feedmessageviewer.cpp
index 9dfdef116..c754181d8 100644
--- a/src/gui/feedmessageviewer.cpp
+++ b/src/gui/feedmessageviewer.cpp
@@ -2,6 +2,7 @@
 
 #include "core/settings.h"
 #include "core/messagesproxymodel.h"
+#include "core/feeddownloader.h"
 #include "gui/webbrowser.h"
 #include "gui/formmain.h"
 #include "gui/iconthemefactory.h"
diff --git a/src/gui/feedmessageviewer.h b/src/gui/feedmessageviewer.h
index 53dcbcc70..4470d97d7 100644
--- a/src/gui/feedmessageviewer.h
+++ b/src/gui/feedmessageviewer.h
@@ -7,6 +7,7 @@
 class WebBrowser;
 class FeedsView;
 class MessagesView;
+class FeedDownloader;
 class QToolBar;
 class QSplitter;
 
@@ -46,6 +47,8 @@ class FeedMessageViewer : public TabContent {
     MessagesView *m_messagesView;
     FeedsView *m_feedsView;
     WebBrowser *m_messagesBrowser;
+
+    FeedDownloader *m_feedDownloader;
 };
 
 #endif // FEEDMESSAGEVIEWER_H
diff --git a/src/main.cpp b/src/main.cpp
index de81168f4..789994609 100644
--- a/src/main.cpp
+++ b/src/main.cpp
@@ -16,7 +16,9 @@
 #include <QSettings>
 #endif
 
+#include <QThread>
 #include <QTranslator>
+#include <QDebug>
 
 
 // TODO: Check if extra UNIX signalling is needed.
@@ -77,6 +79,9 @@ int main(int argc, char *argv[]) {
   QtSingleApplication::setOrganizationDomain(APP_URL);
   QtSingleApplication::setWindowIcon(QIcon(APP_ICON_PATH));
 
+  qDebug().nospace() << "Creating main application form in thread: \'" <<
+                        QThread::currentThreadId() << "\'.";
+
   // Instantiate main application window.
   FormMain window;