diff --git a/include/MedtechAnalysis.hh b/include/MedtechAnalysis.hh
new file mode 100644
index 0000000..3a3a8d5
--- /dev/null
+++ b/include/MedtechAnalysis.hh
@@ -0,0 +1,35 @@
+//
+//  MedtechAnalysis.hh
+//  medtech
+//
+//  Created by Baranyai David on 2018. 04. 03..
+//
+
+#ifndef MedtechAnalysis_hh
+#define MedtechAnalysis_hh
+
+#include <stdio.h>
+#include "TTree.h"
+#include "TFile.h"
+
+class MedtechAnalysis
+{
+private:
+    /* Here will be the instance stored. */
+    static MedtechAnalysis* instance;
+    
+    /* Private constructor to prevent instancing. */
+    TTree *tree;
+    TFile *file;
+public:
+    /* Static access method. */
+    MedtechAnalysis();
+    ~MedtechAnalysis();
+    
+    void Fill(double, double, double);
+    void Close();
+    
+    static MedtechAnalysis* getInstance();
+};
+
+#endif /* MedtechAnalysis_hh */
diff --git a/src/MedtechAnalysis.cc b/src/MedtechAnalysis.cc
new file mode 100644
index 0000000..8dcf3e5
--- /dev/null
+++ b/src/MedtechAnalysis.cc
@@ -0,0 +1,36 @@
+//
+//  MedtechAnalysis.cc
+//  medtech
+//
+//  Created by Baranyai David on 2018. 04. 03..
+//
+
+#include "MedtechAnalysis.hh"
+
+MedtechAnalysis::MedtechAnalysis()
+{
+    tree = new TTree("tree", "tree");
+    file = new TFile("data.root","RECREATE");
+    instance = this;
+}
+
+MedtechAnalysis::~MedtechAnalysis()
+{
+    
+}
+
+void MedtechAnalysis::Fill(double x, double y, double e)
+{
+    tree -> Branch("x", &x, "x/D");
+    tree -> Branch("y", &y, "y/D");
+    tree -> Branch("e", &e, "e/D");
+    
+    tree -> Fill();
+    //tree -> ChangeFile(file);
+}
+
+void MedtechAnalysis::Close()
+{
+    tree -> Write();
+    file -> Close();
+}