diff --git a/backend/.idea/gradle.xml b/backend/.idea/gradle.xml
index f9163b4..ce1c62c 100644
--- a/backend/.idea/gradle.xml
+++ b/backend/.idea/gradle.xml
@@ -1,5 +1,6 @@
 <?xml version="1.0" encoding="UTF-8"?>
 <project version="4">
+  <component name="GradleMigrationSettings" migrationVersion="1" />
   <component name="GradleSettings">
     <option name="linkedExternalProjectsSettings">
       <GradleProjectSettings>
diff --git a/backend/src/main/kotlin/io/github/gelassen/manufactory_knowledge_management/model/Breakdown.kt b/backend/src/main/kotlin/io/github/gelassen/manufactory_knowledge_management/model/Breakdown.kt
new file mode 100644
index 0000000..94f5743
--- /dev/null
+++ b/backend/src/main/kotlin/io/github/gelassen/manufactory_knowledge_management/model/Breakdown.kt
@@ -0,0 +1,10 @@
+package io.github.gelassen.manufactory_knowledge_management.model
+
+data class Breakdown(
+    var id: Long,
+    var failure: String,
+    var solution: String,
+    var dateTime: Long,
+    var machineId: Long,
+    var photofixations: Collection<Photofixation>
+)
diff --git a/backend/src/main/kotlin/io/github/gelassen/manufactory_knowledge_management/model/Machine.kt b/backend/src/main/kotlin/io/github/gelassen/manufactory_knowledge_management/model/Machine.kt
new file mode 100644
index 0000000..7db033f
--- /dev/null
+++ b/backend/src/main/kotlin/io/github/gelassen/manufactory_knowledge_management/model/Machine.kt
@@ -0,0 +1,8 @@
+package io.github.gelassen.manufactory_knowledge_management.model
+
+data class Machine(
+    var id: Long,
+    var name: String,
+    var manufacturer: String,
+    var breakdowns: Collection<Breakdown>
+)
diff --git a/backend/src/main/kotlin/io/github/gelassen/manufactory_knowledge_management/model/Photofixation.kt b/backend/src/main/kotlin/io/github/gelassen/manufactory_knowledge_management/model/Photofixation.kt
new file mode 100644
index 0000000..e169d39
--- /dev/null
+++ b/backend/src/main/kotlin/io/github/gelassen/manufactory_knowledge_management/model/Photofixation.kt
@@ -0,0 +1,7 @@
+package io.github.gelassen.manufactory_knowledge_management.model
+
+data class Photofixation(
+    var id: Long,
+    var photo: String, /* Base64 string*/
+    var breakdownId: Long
+)
\ No newline at end of file