changed error message

Author: plamen5kov

android-static-binding-generator/project/staticbindinggenerator/src/main/java/org/nativescript/staticbindinggenerator/Generator.java

@@ -56,7 +56,7 @@ public void writeBindings(String filename) throws IOException {
                 }
             }
             else {
-                throw new IOException("Trying to write already written file. Both files will have the same file name, which will lead to undefined behavior.\nPlease change the name of one of those classes.\n" + b.getFile());
+                throw new IOException("File already exists. This may lead to undesired behavior.\nPlease change the name of one of the extended classes.\n" + b.getFile());
             }
         }
     }