Yes, it is possible to combine these two code blocks into a single file without changing their functionality. Here's one way to do it:

```java
import net.minecraft.client.renderer.Tessellator;
import net.minecraft.client.renderer.tileentity.TileEntitySpecialRenderer;
import net.minecraft.tileentity.TileEntity;
import net.minecraftforge.fml.client.registry.ClientRegistry;

public class ExampleMod {
    public static class ExampleTESR extends TileEntitySpecialRenderer {
        @Override
        public void render(TileEntity te, double x, double y, double z, float partialTicks, int destroyStage, float alpha) {
            Tessellator tessellator = Tessellator.getInstance();
            // Set up the OpenGL state and perform transformations here...
            // Render the 3D mesh using the Tessellator class...
            // Clean up the OpenGL state here...
        }
    }

    public static void init() {
        ClientRegistry.bindTileEntitySpecialRenderer(ExampleTileEntity.class, new ExampleTESR());
    }
}
```

In this example, the `ExampleTESR` class has been made an inner class of the `ExampleMod` class. The `init` method remains unchanged and continues to bind the custom `TileEntity` class `ExampleTileEntity` with its corresponding TESR, `ExampleTESR`.
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