diff --git a/01-principles/day-01/src/main/java/dummy.md b/01-principles/day-01/src/main/java/dummy.md
new file mode 100644
index 0000000..e135b27
--- /dev/null
+++ b/01-principles/day-01/src/main/java/dummy.md
@@ -0,0 +1 @@
+Just a dummy file to have the folder in Git.
\ No newline at end of file
diff --git a/01-principles/day-01/src/main/resources/dummy.md b/01-principles/day-01/src/main/resources/dummy.md
new file mode 100644
index 0000000..e135b27
--- /dev/null
+++ b/01-principles/day-01/src/main/resources/dummy.md
@@ -0,0 +1 @@
+Just a dummy file to have the folder in Git.
\ No newline at end of file
diff --git a/01-principles/day-01/src/test/java/dummy.md b/01-principles/day-01/src/test/java/dummy.md
new file mode 100644
index 0000000..e135b27
--- /dev/null
+++ b/01-principles/day-01/src/test/java/dummy.md
@@ -0,0 +1 @@
+Just a dummy file to have the folder in Git.
\ No newline at end of file
diff --git a/01-principles/day-01/src/test/resources/dummy.md b/01-principles/day-01/src/test/resources/dummy.md
new file mode 100644
index 0000000..e135b27
--- /dev/null
+++ b/01-principles/day-01/src/test/resources/dummy.md
@@ -0,0 +1 @@
+Just a dummy file to have the folder in Git.
\ No newline at end of file
diff --git a/01-principles/day-01/src/test/scala/dummy.md b/01-principles/day-01/src/test/scala/dummy.md
new file mode 100644
index 0000000..e135b27
--- /dev/null
+++ b/01-principles/day-01/src/test/scala/dummy.md
@@ -0,0 +1 @@
+Just a dummy file to have the folder in Git.
\ No newline at end of file