diff --git a/gradle.properties b/gradle.properties
index 8e402073..de5763e4 100644
--- a/gradle.properties
+++ b/gradle.properties
@@ -8,4 +8,4 @@ uuidVersion=0.1.0
 
 gradle_bintray_plugin_version=1.8.4
 
-core_version=0.3.0
+core_version=0.4.0
diff --git a/postssystem.core/build.gradle b/postssystem.core/build.gradle
index 18a32160..41a32731 100644
--- a/postssystem.core/build.gradle
+++ b/postssystem.core/build.gradle
@@ -38,6 +38,7 @@ kotlin {
             dependencies {
                 implementation kotlin('stdlib')
                 api "org.jetbrains.kotlinx:kotlinx-coroutines-core-common:$kotlin_coroutines_version"
+//                api "org.jetbrains.kotlinx:kotlinx-coroutines-io:$kotlin_io_version"
                 api "org.jetbrains.kotlinx:kotlinx-serialization-runtime-common:$kotlin_serialisation_runtime_version"
 
                 api "com.soywiz.korlibs.klock:klock:$klockVersion"
diff --git a/postssystem.core/gradle.properties b/postssystem.core/gradle.properties
new file mode 100644
index 00000000..d2891c13
--- /dev/null
+++ b/postssystem.core/gradle.properties
@@ -0,0 +1 @@
+kotlin_io_version=0.27.0-eap13
\ No newline at end of file
diff --git a/postssystem.core/src/commonMain/kotlin/com/insanusmokrassar/postssystem/core/content/Content.kt b/postssystem.core/src/commonMain/kotlin/com/insanusmokrassar/postssystem/core/content/Content.kt
index f3bacd77..cdc12b04 100644
--- a/postssystem.core/src/commonMain/kotlin/com/insanusmokrassar/postssystem/core/content/Content.kt
+++ b/postssystem.core/src/commonMain/kotlin/com/insanusmokrassar/postssystem/core/content/Content.kt
@@ -1,5 +1,7 @@
 package com.insanusmokrassar.postssystem.core.content
 
+import com.insanusmokrassar.postssystem.core.utils.ByteArrayAllocator
+import com.insanusmokrassar.postssystem.core.utils.ByteArrayAllocatorSerializer
 import kotlinx.serialization.Serializable
 
 typealias ContentId = String
@@ -11,15 +13,23 @@ typealias ContentId = String
 sealed class Content
 
 @Serializable
-data class SimpleSpecialContent(
+data class SpecialContent(
     val internalId: ContentId
 ) : Content()
 
 @Serializable
-data class SimpleTextContent(
+data class TextContent(
     val text: String
 ) : Content()
 
+@Serializable
+data class BinaryContent(
+    val mimeType: String,
+    val originalFileName: String,
+    @Serializable(ByteArrayAllocatorSerializer::class)
+    val dataAllocator: ByteArrayAllocator
+) : Content()
+
 /**
  * Content which is already registered in database. Using its [id] you can retrieve all known
  * [com.insanusmokrassar.postssystem.core.post.RegisteredPost]s by using
diff --git a/postssystem.core/src/commonMain/kotlin/com/insanusmokrassar/postssystem/core/content/api/WriteContentAPI.kt b/postssystem.core/src/commonMain/kotlin/com/insanusmokrassar/postssystem/core/content/api/WriteContentAPI.kt
index ab9b4d74..4d85020e 100644
--- a/postssystem.core/src/commonMain/kotlin/com/insanusmokrassar/postssystem/core/content/api/WriteContentAPI.kt
+++ b/postssystem.core/src/commonMain/kotlin/com/insanusmokrassar/postssystem/core/content/api/WriteContentAPI.kt
@@ -3,6 +3,6 @@ package com.insanusmokrassar.postssystem.core.content.api
 import com.insanusmokrassar.postssystem.core.content.*
 
 interface WriteContentAPI {
-    suspend fun createContent(content: Content): RegisteredContent?
+    suspend fun registerContent(content: Content): RegisteredContent?
     suspend fun deleteContent(id: ContentId): Boolean
 }
diff --git a/postssystem.core/src/commonMain/kotlin/com/insanusmokrassar/postssystem/core/utils/ByteArrayAllocator.kt b/postssystem.core/src/commonMain/kotlin/com/insanusmokrassar/postssystem/core/utils/ByteArrayAllocator.kt
new file mode 100644
index 00000000..69d419d3
--- /dev/null
+++ b/postssystem.core/src/commonMain/kotlin/com/insanusmokrassar/postssystem/core/utils/ByteArrayAllocator.kt
@@ -0,0 +1,20 @@
+package com.insanusmokrassar.postssystem.core.utils
+
+import kotlinx.serialization.*
+import kotlinx.serialization.builtins.*
+
+typealias ByteArrayAllocator = () -> ByteArray
+
+object ByteArrayAllocatorSerializer : KSerializer<ByteArrayAllocator> {
+    private val realSerializer = ByteArraySerializer()
+    override val descriptor: SerialDescriptor = realSerializer.descriptor
+
+    override fun deserialize(decoder: Decoder): ByteArrayAllocator {
+        val bytes = decoder.decode(realSerializer)
+        return { bytes }
+    }
+
+    override fun serialize(encoder: Encoder, value: ByteArrayAllocator) {
+        encoder.encodeSerializableValue(realSerializer, value())
+    }
+}
diff --git a/postssystem.core/src/commonTest/kotlin/com/insanusmokrassar/postssystem/core/api/ContentSerialization.kt b/postssystem.core/src/commonTest/kotlin/com/insanusmokrassar/postssystem/core/api/ContentSerialization.kt
index 8d03e596..4798c0a9 100644
--- a/postssystem.core/src/commonTest/kotlin/com/insanusmokrassar/postssystem/core/api/ContentSerialization.kt
+++ b/postssystem.core/src/commonTest/kotlin/com/insanusmokrassar/postssystem/core/api/ContentSerialization.kt
@@ -13,9 +13,9 @@ class ContentSerialization {
     @Test
     fun test_that_content_correctly_serializing_and_deserializing() {
         val contents = (0 until simpleTextTestEntries).map {
-            SimpleTextContent("Example$it")
+            TextContent("Example$it")
         } + (0 until simpleSpecialTestEntries).map {
-            SimpleSpecialContent("$it")
+            SpecialContent("$it")
         }
 
         val registeredContentFakes = contents.map { content ->
diff --git a/postssystem.core/src/commonTest/kotlin/com/insanusmokrassar/postssystem/core/api/InMemoryContentAPI.kt b/postssystem.core/src/commonTest/kotlin/com/insanusmokrassar/postssystem/core/api/InMemoryContentAPI.kt
deleted file mode 100644
index 9b135e41..00000000
--- a/postssystem.core/src/commonTest/kotlin/com/insanusmokrassar/postssystem/core/api/InMemoryContentAPI.kt
+++ /dev/null
@@ -1,56 +0,0 @@
-package com.insanusmokrassar.postssystem.core.api
-
-import com.insanusmokrassar.postssystem.core.content.*
-import com.insanusmokrassar.postssystem.core.content.api.ContentAPI
-import com.insanusmokrassar.postssystem.core.utils.generateContentId
-import com.insanusmokrassar.postssystem.core.utils.pagination.*
-import kotlinx.coroutines.channels.BroadcastChannel
-import kotlinx.coroutines.channels.Channel
-import kotlinx.coroutines.flow.Flow
-import kotlinx.coroutines.flow.asFlow
-import kotlinx.serialization.ImplicitReflectionSerializer
-
-@ImplicitReflectionSerializer
-class InMemoryContentAPI(
-    initialContent: List<RegisteredContent> = emptyList()
-): ContentAPI {
-    private val contentCreatedBroadcastChannel = BroadcastChannel<RegisteredContent>(Channel.BUFFERED)
-    private val contentDeletedBroadcastChannel = BroadcastChannel<RegisteredContent>(Channel.BUFFERED)
-
-    override val contentCreatedFlow: Flow<RegisteredContent>
-        get() = contentCreatedBroadcastChannel.asFlow()
-
-    override val contentDeletedFlow: Flow<RegisteredContent>
-        get() = contentDeletedBroadcastChannel.asFlow()
-
-    private val contents: MutableMap<ContentId, RegisteredContent> = initialContent
-        .associateBy(RegisteredContent::id)
-        .toMutableMap()
-
-    override suspend fun createContent(content: Content): RegisteredContent? {
-        return RegisteredContent(
-            generateContentId(),
-            content
-        ).also { registeredContent ->
-            contents[registeredContent.id] = registeredContent
-            contentCreatedBroadcastChannel.send(registeredContent)
-        }
-    }
-
-    override suspend fun getContentsIds(): Set<ContentId> = contents.keys.toSet()
-
-    override suspend fun getContentById(id: ContentId): RegisteredContent? = contents[id]
-
-    override suspend fun getContentByPagination(pagination: Pagination): PaginationResult<out RegisteredContent> {
-        return contents.values.asSequence().drop(pagination.firstIndex).take(pagination.size).toList().createPaginationResult(
-            pagination,
-            commonObjectsNumber = contents.size.toLong()
-        )
-    }
-
-    override suspend fun deleteContent(id: ContentId): Boolean {
-        return contents.remove(id)?.also { content ->
-            contentDeletedBroadcastChannel.send(content)
-        } != null
-    }
-}
\ No newline at end of file
diff --git a/postssystem.core/src/commonTest/kotlin/com/insanusmokrassar/postssystem/core/api/InMemoryPostsAPI.kt b/postssystem.core/src/commonTest/kotlin/com/insanusmokrassar/postssystem/core/api/InMemoryPostsAPI.kt
deleted file mode 100644
index 4d8615f6..00000000
--- a/postssystem.core/src/commonTest/kotlin/com/insanusmokrassar/postssystem/core/api/InMemoryPostsAPI.kt
+++ /dev/null
@@ -1,86 +0,0 @@
-package com.insanusmokrassar.postssystem.core.api
-
-import com.insanusmokrassar.postssystem.core.content.ContentId
-import com.insanusmokrassar.postssystem.core.post.*
-import com.insanusmokrassar.postssystem.core.post.api.PostsAPI
-import com.insanusmokrassar.postssystem.core.utils.generatePostId
-import com.insanusmokrassar.postssystem.core.utils.pagination.*
-import com.soywiz.klock.DateTime
-import kotlinx.coroutines.channels.BroadcastChannel
-import kotlinx.coroutines.channels.Channel.Factory.BUFFERED
-import kotlinx.coroutines.flow.Flow
-import kotlinx.coroutines.flow.asFlow
-import kotlinx.serialization.ImplicitReflectionSerializer
-
-/**
- * Thread-unsafe sample realization of [PostsAPI]
- */
-@ImplicitReflectionSerializer
-class InMemoryPostsAPI(
-    initialPosts: List<RegisteredPost> = emptyList()
-) : PostsAPI {
-    private val posts: MutableMap<PostId, RegisteredPost> = initialPosts.associateBy { it.id }.toMutableMap()
-    private val sortedByDatePosts: List<RegisteredPost>
-        get() = posts.values.sortedBy { it.creationDate }
-
-
-    private val postCreatedBroadcastChannel = BroadcastChannel<RegisteredPost>(BUFFERED)
-    override val postCreatedFlow: Flow<RegisteredPost> = postCreatedBroadcastChannel.asFlow()
-
-    private val postDeletedBroadcastChannel = BroadcastChannel<RegisteredPost>(BUFFERED)
-    override val postDeletedFlow: Flow<RegisteredPost> = postDeletedBroadcastChannel.asFlow()
-
-    private val postUpdatedBroadcastChannel = BroadcastChannel<RegisteredPost>(BUFFERED)
-    override val postUpdatedFlow: Flow<RegisteredPost> = postUpdatedBroadcastChannel.asFlow()
-
-
-    override suspend fun createPost(post: Post): RegisteredPost? {
-        return SimpleRegisteredPost(
-            generatePostId(),
-            post.content
-        ).also { newPost ->
-            posts[newPost.id] = newPost
-            postCreatedBroadcastChannel.send(newPost)
-        }
-    }
-
-    override suspend fun deletePost(id: PostId): Boolean {
-        return posts.remove(id)?.also {
-            postDeletedBroadcastChannel.send(it)
-        } != null
-    }
-
-    override suspend fun updatePostContent(postId: PostId, post: Post): Boolean {
-        return getPostById(postId)?.also { dbPost ->
-            val newPost = SimpleRegisteredPost(
-                dbPost.id,
-                post.content,
-                dbPost.creationDate
-            )
-            posts[newPost.id] = newPost
-            postUpdatedBroadcastChannel.send(newPost)
-        } != null
-    }
-
-    override suspend fun getPostsIds(): Set<PostId> = posts.keys.toSet()
-    override suspend fun getPostById(id: PostId): RegisteredPost? = posts[id]
-    override suspend fun getPostsByContent(id: ContentId): List<RegisteredPost> =
-        posts.values.filter { post -> id in post.content }
-
-    override suspend fun getPostsByCreatingDates(from: DateTime, to: DateTime): List<RegisteredPost> =
-        (from .. to).let { range ->
-            posts.values.filter {
-                it.creationDate in range
-            }
-        }
-
-    override suspend fun getPostsByPagination(
-        pagination: Pagination
-    ): PaginationResult<RegisteredPost> = sortedByDatePosts.subList(
-        pagination.firstIndex,
-        pagination.lastIndex
-    ).createPaginationResult(
-        pagination,
-        commonObjectsNumber = posts.size.toLong()
-    )
-}
diff --git a/postssystem.exposed/src/main/kotlin/com/insanusmokrassar/postssystem/core/exposed/ExposedContentAPI.kt b/postssystem.exposed/src/main/kotlin/com/insanusmokrassar/postssystem/core/exposed/ExposedContentAPI.kt
index e3f5044d..3c74c501 100644
--- a/postssystem.exposed/src/main/kotlin/com/insanusmokrassar/postssystem/core/exposed/ExposedContentAPI.kt
+++ b/postssystem.exposed/src/main/kotlin/com/insanusmokrassar/postssystem/core/exposed/ExposedContentAPI.kt
@@ -2,20 +2,30 @@ package com.insanusmokrassar.postssystem.core.exposed
 
 import com.insanusmokrassar.postssystem.core.content.*
 import com.insanusmokrassar.postssystem.core.content.api.ContentAPI
+import com.insanusmokrassar.postssystem.core.exposed.content.*
 import com.insanusmokrassar.postssystem.core.utils.generateContentId
 import com.insanusmokrassar.postssystem.core.utils.pagination.*
 import kotlinx.coroutines.channels.BroadcastChannel
 import kotlinx.coroutines.flow.Flow
 import kotlinx.coroutines.flow.asFlow
-import kotlinx.serialization.json.Json
 import org.jetbrains.exposed.sql.*
 import org.jetbrains.exposed.sql.transactions.transaction
 
+private val Content.type
+    get() = when (this) {
+        is TextContent -> "text"
+        is BinaryContent -> "binary"
+        is SpecialContent -> "special"
+    }
+
 private class ContentAPIDatabaseTable(
-    private val database: Database
-) : Table("ContentAPI"), ContentAPI {
+    private val database: Database,
+    private val textHolder: ContentHolderRepo<TextContent>,
+    private val binaryHolder: ContentHolderRepo<BinaryContent>,
+    private val specialHolder: ContentHolderRepo<SpecialContent>
+) : Table("ContentAPI"), ContentAPI, ContentHolderRepo<Content> {
     internal val idColumn = text("_id")
-    internal val dataColumn = text("data")
+    internal val typeColumn = text("type")
 
     init {
         transaction(database) {
@@ -28,19 +38,48 @@ private class ContentAPIDatabaseTable(
     override val contentCreatedFlow: Flow<RegisteredContent> = contentCreatedBroadcastChannel.asFlow()
     override val contentDeletedFlow: Flow<RegisteredContent> = contentDeletedBroadcastChannel.asFlow()
 
-    override suspend fun createContent(content: Content): RegisteredContent? {
+    private val String.holder
+        get() = when (this) {
+            "text" -> textHolder
+            "binary" -> binaryHolder
+            "special" -> specialHolder
+            else -> null
+        }
+
+    override suspend fun putContent(id: ContentId, content: Content) {
+        when (content) {
+            is TextContent -> textHolder.putContent(id, content)
+            is BinaryContent -> binaryHolder.putContent(id, content)
+            is SpecialContent -> specialHolder.putContent(id, content)
+        }
+    }
+    override suspend fun getContent(id: ContentId): Content? = transaction(database) {
+        select { idColumn.eq(id) }.limit(1).firstOrNull() ?.get(typeColumn)
+    } ?.holder ?.getContent(id)
+    override suspend fun removeContent(id: ContentId) {
+        transaction(database) {
+            select { idColumn.eq(id) }.limit(1).firstOrNull() ?.get(typeColumn)
+        } ?.holder ?.removeContent(id)
+    }
+
+    override suspend fun registerContent(content: Content): RegisteredContent? {
+        val id = generateContentId()
+        val type = content.type
         return transaction(database) {
             insert {
-                it[idColumn] = generateContentId()
-                it[dataColumn] = Json.stringify(Content.serializer(), content)
-            }.getOrNull(idColumn) ?.let { id ->
-                RegisteredContent(
-                    id,
-                    content
-                )
-            }
+                it[idColumn] = id
+                it[typeColumn] = type
+            }.getOrNull(idColumn)
+        } ?.let { id ->
+            putContent(id, content)
+            RegisteredContent(
+                id,
+                content
+            )
         } ?.also {
             contentCreatedBroadcastChannel.send(it)
+        } ?: null.also {
+            removeContent(id)
         }
     }
     override suspend fun deleteContent(id: ContentId): Boolean {
@@ -51,15 +90,18 @@ private class ContentAPIDatabaseTable(
             } > 0
         }.also {
             if (it) {
+                removeContent(id)
                 contentDeletedBroadcastChannel.send(content)
             }
         }
     }
 
-    private fun ResultRow.asRegisteredContent(): RegisteredContent = RegisteredContent(
-        get(idColumn),
-        Json.parse(Content.serializer(), get(dataColumn))
-    )
+    private fun ResultRow.asRegisteredContent(content: Content): RegisteredContent? = get(idColumn).let {
+        RegisteredContent(
+            it,
+            content
+        )
+    }
 
     override suspend fun getContentsIds(): Set<ContentId> {
         return transaction(database) {
@@ -67,15 +109,16 @@ private class ContentAPIDatabaseTable(
         }.toSet()
     }
     override suspend fun getContentById(id: ContentId): RegisteredContent? {
+        val content = getContent(id) ?: return null
         return transaction(database) {
-            select { idColumn.eq(id) }.firstOrNull() ?.asRegisteredContent()
+            select { idColumn.eq(id) }.limit(1).firstOrNull() ?.asRegisteredContent(content)
         }
     }
     override suspend fun getContentByPagination(pagination: Pagination): PaginationResult<out RegisteredContent> {
         return transaction(database) {
-            selectAll().count() to selectAll().paginate(pagination).map { it.asRegisteredContent() }
+            selectAll().count() to selectAll().paginate(pagination).map { it[idColumn] }
         }.let { (count, results) ->
-            results.createPaginationResult(
+            results.mapNotNull { RegisteredContent(it, getContent(it) ?: return@mapNotNull null) }.createPaginationResult(
                 pagination,
                 count
             )
@@ -84,5 +127,8 @@ private class ContentAPIDatabaseTable(
 }
 
 class ExposedContentAPI (
-    database: Database
-) : ContentAPI by ContentAPIDatabaseTable(database)
+    database: Database,
+    textHolder: ContentHolderRepo<TextContent> = TextContentHolderRepo(database),
+    binaryHolder: ContentHolderRepo<BinaryContent> = BinaryContentHolderRepo(database),
+    specialHolder: ContentHolderRepo<SpecialContent> = SpecialContentHolderRepo(database)
+) : ContentAPI by ContentAPIDatabaseTable(database, textHolder, binaryHolder, specialHolder)
diff --git a/postssystem.exposed/src/main/kotlin/com/insanusmokrassar/postssystem/core/exposed/content/BinaryContentHolderRepo.kt b/postssystem.exposed/src/main/kotlin/com/insanusmokrassar/postssystem/core/exposed/content/BinaryContentHolderRepo.kt
new file mode 100644
index 00000000..85d2646c
--- /dev/null
+++ b/postssystem.exposed/src/main/kotlin/com/insanusmokrassar/postssystem/core/exposed/content/BinaryContentHolderRepo.kt
@@ -0,0 +1,57 @@
+package com.insanusmokrassar.postssystem.core.exposed.content
+
+import com.insanusmokrassar.postssystem.core.content.*
+import org.jetbrains.exposed.sql.*
+import org.jetbrains.exposed.sql.statements.api.ExposedBlob
+import org.jetbrains.exposed.sql.transactions.transaction
+
+private class BinaryContentHolderRepoTable(
+    private val database: Database
+) : ContentHolderRepo<BinaryContent>, Table() {
+    private val idColumn = text("id")
+    private val dataColumn = blob("data")
+    private val mimeColumn = text("mimeType")
+    private val originalFileNameColumn = text("filename")
+    override val primaryKey: PrimaryKey = PrimaryKey(idColumn)
+
+    init {
+        transaction(database) {
+            SchemaUtils.createMissingTablesAndColumns(this@BinaryContentHolderRepoTable)
+        }
+    }
+
+    override suspend fun getContent(id: ContentId): BinaryContent? = transaction(database) {
+        select {
+            idColumn.eq(id)
+        }.limit(1).firstOrNull() ?.let {
+            val bytes = it[dataColumn].bytes
+            BinaryContent(
+                it[mimeColumn],
+                it[originalFileNameColumn]
+            ) {
+                bytes
+            }
+        }
+    }
+
+    override suspend fun removeContent(id: ContentId) {
+        transaction(database) {
+            deleteWhere { idColumn.eq(id) }
+        }
+    }
+
+    override suspend fun putContent(id: ContentId, content: BinaryContent) {
+        transaction(database) {
+            insert {
+                it[idColumn] = id
+                it[originalFileNameColumn] = content.originalFileName
+                it[mimeColumn] = content.mimeType
+                it[dataColumn] = ExposedBlob(content.dataAllocator())
+            }
+        }
+    }
+}
+
+class BinaryContentHolderRepo(
+    database: Database
+) : ContentHolderRepo<BinaryContent> by BinaryContentHolderRepoTable(database)
\ No newline at end of file
diff --git a/postssystem.exposed/src/main/kotlin/com/insanusmokrassar/postssystem/core/exposed/content/ContentHolderRepo.kt b/postssystem.exposed/src/main/kotlin/com/insanusmokrassar/postssystem/core/exposed/content/ContentHolderRepo.kt
new file mode 100644
index 00000000..2e406c48
--- /dev/null
+++ b/postssystem.exposed/src/main/kotlin/com/insanusmokrassar/postssystem/core/exposed/content/ContentHolderRepo.kt
@@ -0,0 +1,10 @@
+package com.insanusmokrassar.postssystem.core.exposed.content
+
+import com.insanusmokrassar.postssystem.core.content.Content
+import com.insanusmokrassar.postssystem.core.content.ContentId
+
+interface ContentHolderRepo<T : Content> {
+    suspend fun getContent(id: ContentId) : T?
+    suspend fun removeContent(id: ContentId)
+    suspend fun putContent(id: ContentId, content: T)
+}
diff --git a/postssystem.exposed/src/main/kotlin/com/insanusmokrassar/postssystem/core/exposed/content/SpecialContentHolderRepo.kt b/postssystem.exposed/src/main/kotlin/com/insanusmokrassar/postssystem/core/exposed/content/SpecialContentHolderRepo.kt
new file mode 100644
index 00000000..ceb4eb1b
--- /dev/null
+++ b/postssystem.exposed/src/main/kotlin/com/insanusmokrassar/postssystem/core/exposed/content/SpecialContentHolderRepo.kt
@@ -0,0 +1,46 @@
+package com.insanusmokrassar.postssystem.core.exposed.content
+
+import com.insanusmokrassar.postssystem.core.content.*
+import org.jetbrains.exposed.sql.*
+import org.jetbrains.exposed.sql.transactions.transaction
+
+private class SpecialContentHolderRepoTable(
+    private val database: Database
+) : ContentHolderRepo<SpecialContent>, Table() {
+    private val idColumn = text("id")
+    private val internalIdColumn = text("internalId")
+    override val primaryKey: PrimaryKey = PrimaryKey(idColumn)
+
+    init {
+        transaction(database) {
+            SchemaUtils.createMissingTablesAndColumns(this@SpecialContentHolderRepoTable)
+        }
+    }
+
+    override suspend fun getContent(id: ContentId): SpecialContent? = transaction(database) {
+        select {
+            idColumn.eq(id)
+        }.limit(1).firstOrNull() ?.get(internalIdColumn) ?.let {
+            SpecialContent(it)
+        }
+    }
+
+    override suspend fun removeContent(id: ContentId) {
+        transaction(database) {
+            deleteWhere { idColumn.eq(id) }
+        }
+    }
+
+    override suspend fun putContent(id: ContentId, content: SpecialContent) {
+        transaction(database) {
+            insert {
+                it[idColumn] = id
+                it[internalIdColumn] = content.internalId
+            }
+        }
+    }
+}
+
+class SpecialContentHolderRepo(
+    database: Database
+) : ContentHolderRepo<SpecialContent> by SpecialContentHolderRepoTable(database)
\ No newline at end of file
diff --git a/postssystem.exposed/src/main/kotlin/com/insanusmokrassar/postssystem/core/exposed/content/TextContentHolderRepo.kt b/postssystem.exposed/src/main/kotlin/com/insanusmokrassar/postssystem/core/exposed/content/TextContentHolderRepo.kt
new file mode 100644
index 00000000..8ae5d8bb
--- /dev/null
+++ b/postssystem.exposed/src/main/kotlin/com/insanusmokrassar/postssystem/core/exposed/content/TextContentHolderRepo.kt
@@ -0,0 +1,47 @@
+package com.insanusmokrassar.postssystem.core.exposed.content
+
+import com.insanusmokrassar.postssystem.core.content.ContentId
+import com.insanusmokrassar.postssystem.core.content.TextContent
+import org.jetbrains.exposed.sql.*
+import org.jetbrains.exposed.sql.transactions.transaction
+
+private class TextContentHolderRepoTable(
+    private val database: Database
+) : ContentHolderRepo<TextContent>, Table() {
+    private val idColumn = text("id")
+    private val textColumn = text("text")
+    override val primaryKey: PrimaryKey = PrimaryKey(idColumn)
+
+    init {
+        transaction(database) {
+            SchemaUtils.createMissingTablesAndColumns(this@TextContentHolderRepoTable)
+        }
+    }
+
+    override suspend fun getContent(id: ContentId): TextContent? = transaction(database) {
+        select {
+            idColumn.eq(id)
+        }.limit(1).firstOrNull() ?.get(textColumn) ?.let {
+            TextContent(it)
+        }
+    }
+
+    override suspend fun removeContent(id: ContentId) {
+        transaction(database) {
+            deleteWhere { idColumn.eq(id) }
+        }
+    }
+
+    override suspend fun putContent(id: ContentId, content: TextContent) {
+        transaction(database) {
+            insert {
+                it[idColumn] = id
+                it[textColumn] = content.text
+            }
+        }
+    }
+}
+
+class TextContentHolderRepo(
+    database: Database
+) : ContentHolderRepo<TextContent> by TextContentHolderRepoTable(database)
\ No newline at end of file
diff --git a/postssystem.exposed/src/test/kotlin/com/insanusmokrassar/postssystem/core/exposed/ExposedContentAPICommonTests.kt b/postssystem.exposed/src/test/kotlin/com/insanusmokrassar/postssystem/core/exposed/ExposedContentAPICommonTests.kt
index 23feaae8..d579f6f1 100644
--- a/postssystem.exposed/src/test/kotlin/com/insanusmokrassar/postssystem/core/exposed/ExposedContentAPICommonTests.kt
+++ b/postssystem.exposed/src/test/kotlin/com/insanusmokrassar/postssystem/core/exposed/ExposedContentAPICommonTests.kt
@@ -1,12 +1,13 @@
 package com.insanusmokrassar.postssystem.core.exposed
 
-import com.insanusmokrassar.postssystem.core.content.SimpleTextContent
+import com.insanusmokrassar.postssystem.core.content.TextContent
 import kotlinx.coroutines.runBlocking
 import org.jetbrains.exposed.sql.Database
 import org.jetbrains.exposed.sql.transactions.transactionManager
 import java.io.File
 import java.sql.Connection
 import kotlin.test.Test
+import kotlin.test.assertEquals
 
 class ExposedContentAPICommonTests {
     private val tempFolder = System.getProperty("java.io.tmpdir")!!
@@ -20,6 +21,10 @@ class ExposedContentAPICommonTests {
         }
 
         val apis = databaseFiles.map {
+            File(it).also {
+                it.delete()
+                it.deleteOnExit()
+            }
             ExposedContentAPI(
                 Database.Companion.connect("jdbc:sqlite:$it", driver = "org.sqlite.JDBC").also {
                     it.transactionManager.defaultIsolationLevel = Connection.TRANSACTION_SERIALIZABLE
@@ -28,9 +33,10 @@ class ExposedContentAPICommonTests {
         }
 
         val results = apis.mapIndexed { i, api ->
-            val content = runBlocking { api.createContent(SimpleTextContent(i.toString())) }
+            val content = runBlocking { api.registerContent(TextContent(i.toString())) }
             assert(content != null)
-            assert(runBlocking { api.getContentsIds().size == 1 })
+            val ids = runBlocking { api.getContentsIds() }
+            assertEquals(ids.size, 1)
             content!!
         }