Make EventBFileWriter safe from exceptions.

Make sure all closeable objects in EventBFileWriter are properly closed,
even in the presence of exceptions.

src/main/java/ca/mcscert/jtet/eventbgenerator/EventBFileWriter.java

@@ -28,10 +28,7 @@
  */
 package ca.mcscert.jtet.eventbgenerator;
 
-import java.io.BufferedWriter;
-import java.io.FileOutputStream;
-import java.io.IOException;
-import java.io.OutputStreamWriter;
+import java.io.*;
 
 /**
  *
@@ -39,14 +36,36 @@ import java.io.OutputStreamWriter;
  */
 final public class EventBFileWriter {
 
-    public static void writeEventBFile(String fileName, String fileContent) {
+    public static void writeEventBBumFile(String fileName, String content) throws IOException {
+        FileOutputStream fos = null;
+
         try {
-            BufferedWriter br = new BufferedWriter(new OutputStreamWriter(new FileOutputStream(fileName + ".bum"), "UTF8"));
-            br.write(fileContent);
-            br.flush();
-            br.close();
-        } catch (IOException e) {
-            e.printStackTrace();
+            fos = new FileOutputStream(fileName);
+            OutputStreamWriter osw = null;
+
+            try {
+                osw = new OutputStreamWriter(fos, "UTF8");
+                BufferedWriter bw = null;
+
+                try {
+                    bw = new BufferedWriter(osw);
+                    bw.write(content);
+                    bw.flush();
+                } finally {
+                    if (bw != null) {
+                        bw.close();
+                    }
+                }
+
+            } finally {
+                if (osw != null) {
+                    osw.close();
+                }
+            }
+        } finally {
+            if (fos != null) {
+                fos.close();
+            }
         }
     }
 }