Make Buffer members private.

src/com/bdjb/api/Buffer.java

@@ -18,9 +18,9 @@ public class Buffer {
     }
   }
 
-  protected final long address;
+  private final long address;
 
-  protected final int size;
+  private final int size;
 
   public Buffer(int size) {
     this.size = size;

src/com/bdjb/api/Text.java

@@ -13,7 +13,7 @@ public class Text extends Buffer {
   public Text(String text) {
     super(text.length() + 1);
     this.text = text;
-    api.strcpy(address, text);
+    api.strcpy(address(), text);
   }
 
   public String toString() {