Created StockInformationCSVWriter

src/main/java/millions/StockInformationCSVReader.java

@@ -7,7 +7,7 @@
 
 
 public class StockInformationCSVReader {
-  File file;
+  private final File file;
 
   public StockInformationCSVReader(File file) {
     this.file = file;

src/main/java/millions/StockInformationCSVWriter.java

@@ -0,0 +1,34 @@
+package millions;
+
+import java.io.*;
+import java.math.BigDecimal;
+import java.util.ArrayList;
+import java.util.List;
+
+public class StockInformationCSVWriter {
+  private final List<Stock> stocks;
+  private final File destinationFile;
+
+  public StockInformationCSVWriter(List<Stock> stocks,File destinationFile) {
+    this.stocks = stocks;
+    this.destinationFile = destinationFile;
+  }
+
+  public void write() {
+    StringBuilder builder = new StringBuilder();
+    for (Stock stock : stocks) {
+      builder.append(stock.getSymbol());
+      builder.append(",");
+      builder.append(stock.getCompany());
+      builder.append(",");
+      // Unsure if price history or just latest price should be saved
+      builder.append(stock.getSalesPrice().toPlainString());
+      builder.append("\n");
+    }
+    try (FileWriter writer = new FileWriter(destinationFile); BufferedWriter bufferedWriter = new BufferedWriter(writer)) {
+      bufferedWriter.write(builder.toString());
+    } catch (IOException e) {
+      e.printStackTrace();
+    }
+  }
+}