Add documentation, minor fixes

tools/java/common/src/com/google/i18n/phonenumbers/CopyrightNotice.java

@@ -53,5 +53,6 @@ public class CopyrightNotice {
     writer.write(TEXT_OPENING);
     Formatter formatter = new Formatter(writer);
     formatter.format(TEXT, year, yearSecondAuthor);
+    formatter.close();
   }
 }

tools/scripts/generate_metadata.sh

@@ -64,10 +64,12 @@ echo "\
 $copyright_header
 
 mod metadata;
+
+// use only in test case 
+#[cfg(test)]
 mod test_metadata;
 
 pub use metadata::METADATA;
-// use only in test case 
 #[cfg(test)]
 pub use test_metadata::TEST_METADATA;
 " > "$generated_dir/mod.rs"