Add types to base and simple targets

library/src/main/java/com/bumptech/glide/request/target/BaseTarget.java

@@ -19,7 +19,7 @@ import com.bumptech.glide.request.Request;
  *     For loading {@link Bitmap}s into {@link View}s, {@link ViewTarget} is preferable to this class.
  * </p>
  */
-public abstract class BaseTarget implements Target {
+public abstract class BaseTarget<Z> implements Target<Z> {
 
     private Request request;
 

library/src/main/java/com/bumptech/glide/request/target/SimpleTarget.java

@@ -5,7 +5,7 @@ package com.bumptech.glide.request.target;
  * caller to specify an exact width/height.
  */
 @SuppressWarnings("unused")
-public abstract class SimpleTarget extends BaseTarget {
+public abstract class SimpleTarget<Z> extends BaseTarget<Z> {
     private final int width;
     private final int height;