diff --git a/src/Lib/session.cpp b/src/Lib/session.cpp
old mode 100755
new mode 100644
index 0e79879..ea9e93e
--- a/src/Lib/session.cpp
+++ b/src/Lib/session.cpp
@@ -1,5 +1,5 @@
 /*
- * Copyright 2014-2016 Markus Prasser
+ * Copyright 2014-2018 Markus Prasser, Tobias Weiss
  *
  * This file is part of Labcontrol.
  *
@@ -17,14 +17,16 @@
  *  along with Labcontrol.  If not, see <http://www.gnu.org/licenses/>.
  */
 
-#include <memory>
-
 #include "session.h"
 #include "settings.h"
 
+#include <QDir>
+
+#include <memory>
+
 extern std::unique_ptr< lc::Settings > settings;
 
-lc::Session::Session( QVector< Client* > &&argAssocClients,
+lc::Session::Session( QVector< Client * > &&argAssocClients,
                       const QString &argZTreeDataTargetPath, const quint16 argZTreePort,
                       const QString &argZTreeVersionPath, bool argPrintReceiptsForLocalClients,
                       const QString &argAnonymousReceiptsPlaceholder,
@@ -54,14 +56,16 @@ lc::Session::Session( QVector< Client* > &&argAssocClients,
     }
 }
 
-lc::Session::~Session() {
+lc::Session::~Session()
+{
     for ( auto &client : assocClients ) {
         client->SetSessionPort( 0 );
         client->SetzLeafVersion( "" );
     }
 }
 
-QVariant lc::Session::GetDataItem( int argIndex ) {
+QVariant lc::Session::GetDataItem( int argIndex )
+{
     switch ( argIndex ) {
     case 0:
         return QVariant{ zTreeVersionPath.split( '_', QString::KeepEmptyParts, Qt::CaseInsensitive )[ 1 ] };
@@ -72,7 +76,8 @@ QVariant lc::Session::GetDataItem( int argIndex ) {
     }
 }
 
-void lc::Session::InitializeClasses() {
+void lc::Session::InitializeClasses()
+{
     // Create the new data directory
     QDir dir{ zTreeDataTargetPath };
     QString date_string( QDateTime::currentDateTime().toString( "yyMMdd_hhmm" ) );
@@ -87,7 +92,7 @@ void lc::Session::InitializeClasses() {
              this, &Session::OnzTreeClosed );
     // Only create a 'Receipts_Handler' instance, if all neccessary variables were set
     if ( latexHeaderName != "None found" && !settings->dvipsCmd.isEmpty()
-         && !settings->latexCmd.isEmpty() ) {
+            && !settings->latexCmd.isEmpty() ) {
         new ReceiptsHandler{ zTreeDataTargetPath, printReceiptsForLocalClients,
                              anonymousReceiptsPlaceholder, latexHeaderName, this };
     } else {
@@ -95,12 +100,14 @@ void lc::Session::InitializeClasses() {
     }
 }
 
-void lc::Session::OnzTreeClosed( int argExitCode ) {
+void lc::Session::OnzTreeClosed( int argExitCode )
+{
     qDebug() << "z-Tree running on port" << zTreePort << "closed with exit code" << argExitCode;
     emit SessionFinished( this );
 }
 
-void lc::Session::RenameWindow() {
+void lc::Session::RenameWindow()
+{
     // Example: wmctrl -r <window name> -T <new name>
 
     QStringList arguments;
diff --git a/src/Lib/ztree.cpp b/src/Lib/ztree.cpp
old mode 100755
new mode 100644
index 706d11b..4c1c3e5
--- a/src/Lib/ztree.cpp
+++ b/src/Lib/ztree.cpp
@@ -1,5 +1,5 @@
 /*
- * Copyright 2014-2016 Markus Prasser
+ * Copyright 2014-2018 Markus Prasser, Tobias Weiss
  *
  * This file is part of Labcontrol.
  *
@@ -17,35 +17,35 @@
  *  along with Labcontrol.  If not, see <http://www.gnu.org/licenses/>.
  */
 
-#include <memory>
+#include "settings.h"
+#include "ztree.h"
 
 #include <QDebug>
+#include <QDir>
 
-#include "settings.h"
-#include "ztree.h"
+#include <memory>
 
-extern std::unique_ptr< lc::Settings > settings;
+extern std::unique_ptr<lc::Settings> settings;
 
-lc::ZTree::ZTree( const QString &argZTreeDataTargetPath, const int &argZTreePort,
-                  const QString &argZTreeVersionPath, QObject *argParent ) :
-    QObject{ argParent }
+lc::ZTree::ZTree(const QString &argZTreeDataTargetPath, const int argZTreePort,
+                 const QString &argZTreeVersionPath, QObject *argParent) :
+    QObject{argParent}
 {
-    QStringList arguments{ QStringList{} << "-c" << "0" << settings->wineCmd
-                                         << QString{ settings->zTreeInstDir + "/zTree_"
-                                            + argZTreeVersionPath + "/ztree.exe" }
-                                         << "/datadir" << QString{ "Z:/" + argZTreeDataTargetPath }
-                                         << "/privdir" << QString{ "Z:/" + argZTreeDataTargetPath }
-                                         << "/gsfdir" << QString{ "Z:/" + argZTreeDataTargetPath }
-                                         << "/tempdir" << QString{ "Z:/" + argZTreeDataTargetPath }
-                                         << "/leafdir" << QString{ "Z:/" + argZTreeDataTargetPath }
-                                         << "/channel" << QString::number( argZTreePort - 7000 ) };
+    QStringList arguments{QStringList{} << "-c" << "0" << settings->wineCmd
+                          << QString{settings->zTreeInstDir + "/zTree_"
+                                     + argZTreeVersionPath + "/ztree.exe"}
+                          << "/datadir" << QString{"Z:/" + argZTreeDataTargetPath}
+                          << "/privdir" << QString{"Z:/" + argZTreeDataTargetPath}
+                          << "/gsfdir" << QString{"Z:/" + argZTreeDataTargetPath}
+                          << "/tempdir" << QString{"Z:/" + argZTreeDataTargetPath}
+                          << "/leafdir" << QString{"Z:/" + argZTreeDataTargetPath}
+                          << "/channel" << QString::number(argZTreePort - 7000)};
 
-    QProcessEnvironment env = QProcessEnvironment::systemEnvironment();
-    zTreeInstance.setProcessEnvironment( env );
-    zTreeInstance.setWorkingDirectory( QDir::homePath() );
-    zTreeInstance.start( settings->tasksetCmd, arguments, QIODevice::NotOpen );
-    connect( &zTreeInstance, SIGNAL( finished( int ) ),
-             this, SIGNAL( ZTreeClosed( int ) ) );
+    zTreeInstance.setProcessEnvironment(QProcessEnvironment::systemEnvironment());
+    zTreeInstance.setWorkingDirectory(QDir::homePath());
+    zTreeInstance.start(settings->tasksetCmd, arguments, QIODevice::NotOpen);
+    connect(&zTreeInstance, SIGNAL(finished(int)),
+            this, SIGNAL(ZTreeClosed(int)));
 
-    qDebug() << settings->tasksetCmd << arguments.join( " " );
+    qDebug() << settings->tasksetCmd << arguments.join(" ");
 }
diff --git a/src/Lib/ztree.h b/src/Lib/ztree.h
old mode 100755
new mode 100644
index 2935189..1684b07
--- a/src/Lib/ztree.h
+++ b/src/Lib/ztree.h
@@ -1,5 +1,5 @@
 /*
- * Copyright 2014-2016 Markus Prasser
+ * Copyright 2014-2018 Markus Prasser, Tobias Weiss
  *
  * This file is part of Labcontrol.
  *
@@ -20,33 +20,32 @@
 #ifndef ZTREE_H
 #define ZTREE_H
 
-#include <QDir>
-#include <QPlainTextEdit>
-#include <QProcess>
-
 #include "global.h"
 
+#include <QProcess>
+
 namespace lc {
 
 //! A class to contain running zTree instances.
 /*!
   This class is element of every session and is used to handle all zTree related data.
 */
-class ZTree: public QObject {
+class ZTree: public QObject
+{
     Q_OBJECT
 
 public:
-    ZTree( const QString &argZTreeDataTargetPath,
-           const int &argZTreePort, const QString &argZTreeVersionPath,
-           QObject *argParent = nullptr );
+    ZTree(const QString &argZTreeDataTargetPath,
+          const int argZTreePort, const QString &argZTreeVersionPath,
+          QObject *argParent = nullptr);
 
 signals:
-    void ZTreeClosed( int argExitCode );
+    void ZTreeClosed(int argExitCode);
 
 private:
     QProcess zTreeInstance;
 };
 
-}
+} // namespace lc
 
 #endif // ZTREE_H