Move security manager checks.

src/com/bdjb/Exploit.java

@@ -29,8 +29,7 @@ class Exploit implements Runnable {
 
     for (int i = 0; i < exploits.length; i++) {
       try {
-        exploits[i].trigger();
-        if (System.getSecurityManager() == null) {
+        if (exploits[i].trigger()) {
           break;
         }
       } catch (Exception e) {

src/com/bdjb/exploit/sandbox/ExploitServiceProxyImpl.java

@@ -57,6 +57,6 @@ public class ExploitServiceProxyImpl implements ExploitSandboxInterface {
     Class payloadClass = urlClassLoader.loadClass(PAYLOAD_CLASS_NAME);
     payloadClass.newInstance();
 
-    return true;
+    return System.getSecurityManager() == null;
   }
 }

src/com/bdjb/exploit/sandbox/ExploitUserPrefsImpl.java

@@ -44,7 +44,7 @@ public class ExploitUserPrefsImpl implements ExploitSandboxInterface {
         // Instantiate the payload class.
         PayloadClassLoader.getInstance().newPayload();
 
-        return true;
+        return System.getSecurityManager() == null;
       }
     } finally {
       // Restore userprefs file.