Test?

src/Execute.java

@@ -0,0 +1,13 @@
+import java.util.ArrayList;
+
+/**The class Execute is the executen file for the whole programm.
+ */
+public class Execute {
+    public static void main (String[]args){
+        ArrayList<String> data = GeneralMethods.readData("test.csv");
+        for(String d : data){
+            System.out.println(d);
+        }
+        GeneralMethods.writeData("test2.csv",data);
+    }
+}

src/GeneralMethods.java

@@ -0,0 +1,53 @@
+import java.io.BufferedWriter;
+import java.io.FileWriter;
+import java.io.IOException;
+import java.nio.file.Files;
+import java.nio.file.Paths;
+import java.util.ArrayList;
+import java.util.List;
+
+/**GeneralMethods is a class for commen public methods.
+ *
+ * @auhtor Felix Wöstemeyer
+ *
+ * @version 1.0
+ */
+public class GeneralMethods {
+
+    /**The method readData gives back an ArrayList from the data of a given file.
+     *
+     * @param pathRead the given filepath to read
+     * @return returns an ArrayList of Strings with the read data
+     */
+    public static ArrayList<String> readData(String pathRead){
+        try {
+            ArrayList<String> data = new ArrayList<String>();
+            List<String> lines = Files.readAllLines(Paths.get(pathRead));
+            for(String line : lines){
+                data.add(line);
+            }
+            return data;
+        } catch (IOException e) {
+            e.printStackTrace();
+            return new ArrayList<String>();
+        }
+    }
+
+    /**The method writeData saves the given data to a certain file.
+     *
+     * @param pathWrite the given filepath to write
+     * @param data the data to be saved
+     */
+    public static void writeData(String pathWrite, ArrayList<String> data){
+        try{
+            BufferedWriter writer = new BufferedWriter(new FileWriter(pathWrite));
+            for (String d : data) {
+                writer.write(d);
+                writer.newLine();
+            }
+            writer.close();
+        } catch (IOException e) {
+            e.printStackTrace();
+        }
+    }
+}