Refactor: replaced sourceId by source and introduced source param in some methods;

Mage/src/main/java/mage/game/events/AttachEvent.java

@@ -0,0 +1,17 @@
+package mage.game.events;
+
+import mage.abilities.Ability;
+import mage.game.permanent.Permanent;
+
+import java.util.UUID;
+
+/**
+ * @author JayDi85
+ */
+public class AttachEvent extends GameEvent {
+
+    public AttachEvent(UUID targetPermanentId, Permanent attachment, Ability source) {
+        super(GameEvent.EventType.ATTACH, targetPermanentId, null, attachment.getControllerId());
+        this.setSourceId(attachment.getId());
+    }
+}