All working, able to be built to .jar

src/main/java/CellFileWriter.java

@@ -0,0 +1,38 @@
+import org.apache.commons.csv.CSVFormat;
+import org.apache.commons.csv.CSVPrinter;
+
+import java.io.BufferedWriter;
+import java.io.IOException;
+import java.nio.file.Files;
+import java.nio.file.Path;
+import java.nio.file.StandardOpenOption;
+import java.util.List;
+
+public class CellFileWriter {
+
+    private String[] headers = {"Alpha", "Beta"};
+    List<Integer[]> cells;
+    String filename;
+
+    public CellFileWriter(String filename, CellSample cells) {
+        if(!filename.matches(".*\\.csv")){
+            filename = filename + ".csv";
+        }
+        this.filename = filename;
+        this.cells = cells.getCells();
+    }
+
+    public void writeCellsToFile() {
+        CSVFormat cellFileFormat = CSVFormat.Builder.create()
+                .setHeader(headers)
+                .build();
+        try(BufferedWriter writer = Files.newBufferedWriter(Path.of(filename), StandardOpenOption.CREATE_NEW);
+            CSVPrinter printer = new CSVPrinter(writer, cellFileFormat);
+        ){
+            printer.printRecords(cells);
+        } catch(IOException ex){
+            System.out.println("Could not make new file named "+filename);
+            System.err.println(ex);
+        }
+    }
+}