Javadocs and unit tests, God help me.

test/net/sf/briar/TestUtils.java

@@ -4,9 +4,13 @@ import java.io.File;
 import java.io.FileOutputStream;
 import java.io.IOException;
 import java.io.PrintStream;
+import java.util.concurrent.atomic.AtomicInteger;
 
 public class TestUtils {
 
+	private static final AtomicInteger nextTestDir =
+		new AtomicInteger((int) (Math.random() * 1000 * 1000));
+
 	public static void delete(File f) throws IOException {
 		if(f.isDirectory()) for(File child : f.listFiles()) delete(child);
 		f.delete();
@@ -19,4 +23,10 @@ public class TestUtils {
 		out.flush();
 		out.close();
 	}
+
+	public static File getTestDirectory() {
+		int name = nextTestDir.getAndIncrement();
+		File testDir = new File("test.tmp/" + name);
+		return testDir;
+	}
 }

test/net/sf/briar/setup/SetupWorkerTest.java

@@ -22,7 +22,7 @@ public class SetupWorkerTest extends TestCase {
 
 	private static final int HEADER_SIZE = 1234;
 
-	private final File testDir = new File("test.tmp");
+	private final File testDir = TestUtils.getTestDirectory();
 	private final File jar = new File(testDir, "test.jar");
 
 	@Before

test/net/sf/briar/util/FileUtilsTest.java

@@ -18,7 +18,7 @@ import org.junit.Test;
 
 public class FileUtilsTest extends TestCase {
 
-	private final File testDir = new File("test.tmp");
+	private final File testDir = TestUtils.getTestDirectory();
 
 	@Before
 	public void setUp() {

test/net/sf/briar/util/ZipUtilsTest.java

@@ -24,7 +24,7 @@ import org.junit.Test;
 
 public class ZipUtilsTest extends TestCase {
 
-	private final File testDir = new File("test.tmp");
+	private final File testDir = TestUtils.getTestDirectory();
 
 	private final File f1 = new File(testDir, "abc/def/1");
 	private final File f2 = new File(testDir, "abc/def/2");