Added tests for ecj, fixed a few minor bugs that came out of that.

test/transform/resource/after-ecj/SynchronizedPlain.java

@@ -0,0 +1,37 @@
+import lombok.Synchronized;
+class SynchronizedPlain1 {
+  private final @java.lang.SuppressWarnings("all") java.lang.Object $lock = new java.lang.Object[0];
+  SynchronizedPlain1() {
+    super();
+  }
+  @lombok.Synchronized void test() {
+    synchronized (this.$lock)
+      {
+        System.out.println("one");
+      }
+  }
+  @Synchronized void test2() {
+    synchronized (this.$lock)
+      {
+        System.out.println("two");
+      }
+  }
+}
+class SynchronizedPlain2 {
+  private static final @java.lang.SuppressWarnings("all") java.lang.Object $LOCK = new java.lang.Object[0];
+  SynchronizedPlain2() {
+    super();
+  }
+  static @lombok.Synchronized void test() {
+    synchronized (SynchronizedPlain2.$LOCK)
+      {
+        System.out.println("three");
+      }
+  }
+  static @Synchronized void test2() {
+    synchronized (SynchronizedPlain2.$LOCK)
+      {
+        System.out.println("four");
+      }
+  }
+}