diff --git a/model/src/main/java/one/nem/lacerta/model/document/placeholder b/model/src/main/java/one/nem/lacerta/model/document/placeholder
new file mode 100644
index 00000000..e69de29b
diff --git a/model/src/main/java/one/nem/lacerta/model/meta/placeholder b/model/src/main/java/one/nem/lacerta/model/meta/placeholder
new file mode 100644
index 00000000..e69de29b